DIS 2007

16 Apr 2007, 09:00 → 20 Apr 2007, 17:45 Europe/Zurich

Holiday Inn Munich City Centre & Gasteig Conference Center

XV International Workshop on Deep-Inelastic Scattering and Related Subjects

Sunday 15 April

17:00 → 19:00 Registration

18:00 → 20:00 Reception

Monday 16 April

08:00 → 09:00 Breakfast

09:00 → 10:45 Plenary Session

09:00 Welcome to DIS 2007

09:15 Developments in Perturbative QCD

Speaker: Yuri Dokshitzer

Slides yudok_DIS2007.pdf

09:45 H1 Overview

Speaker: Cristinel Diaconu

Slides h1.pdf

10:15 ZEUS Overview

Speaker: Massimo Corradi

Slides corradi_zeus_preview.2.pdf.pdf corradi_zeus_preview.2.ps.ps

10:45 → 11:15 Coffee/Tea

11:15 → 12:45 Plenary Session

11:15 Progress & Challenges PDFs

Speaker: Andreas Vogt

Slides 05-vogt.pdf

11:45 Spin Overview

Speaker: Jörg Pretz

Slides jpretz_dis07.pdf

12:15 QCD & MC Event Generators

Speaker: Zoltan Nagy (CERN)

Slides pl-nagyz.key.tar.gz pl-znagy.pdf

12:45 → 14:00 Lunch

14:00 → 16:00 Plenary Session

14:00 J-Lab Overview

Speaker: Zein-Eddine Meziani (Temple)

Slides Meziani_DIS2007.pdf

14:30 Results from Lattice QCD

Speaker: Peter Weisz

Slides weisz.pdf

15:00 Tevatron Overview

Speaker: Giorgio Chiarelli

Slides 10-chiarelli.pdf

15:30 Heavy Flavor

Speaker: Gustav Kramer

Slides dis2007-kramerd.pdf

16:00 → 16:30 Coffee/Tea

16:30 → 18:00 Plenary Session

16:30 RHIC Overview

Speaker: William Zajc

Slides ZajcDIS07.pdf ZajcDIS07.ppt

17:00 Developments in Small-x Physics

Speaker: Raju Venugopalan

Slides DIS_raju_final.pdf

17:30 String Theory and QCD

Speaker: Johanna Erdmenger

Slides dis2.pdf

Tuesday 17 April

08:00 → 09:00 Breakfast

09:00 → 10:40 Diffraction and Vector Mesons: 1

09:00 Diffraction and multiple gluon production from JIMWaLK formalism

Diffraction and Multiple Gluon Production from JIMWaLK formalism

Speaker: Michael Lublinsky (Stony Brook University)

Slides dis_07_diff.pdf

09:20 Inclusive diffraction using the Mx method

Inclusive Diffraction using the Mx method

Speaker: Bernd Loehr (DESY)

Slides Loehr-DIS07.pdf.pdf

09:40 Inclusive diffraction (LPS and LRG)

Inclusive Diffraction (LPS and LRG)

Speaker: Jaroslaw Lukasik (DESY / AGH-UST Cracow)

Slides jarek.pdf

10:00 Diffractive dijets in DIS and PHP

Diffractive Dijets in DIS and PHP

Speaker: Matthias Mozer (Vrije Universiteit Brussel, IIHE - ELEM)

Slides mozer_dis07.pdf

10:20 Dijet production in diffraction (DIS and PHP)

Dijet Production in Diffraction (DIS and PHP)

Speaker: Yuji Yamazaki (KEK)

Slides yamazaki-dis2007-v2.pdf yamazaki-dis2007-v2.pdf

09:00 → 10:40 Heavy Flavors: 1 - Charm at HERA

Convener: Benno List (University of Hamburg)

09:00 DIS charm cross sections through D* and D meson tagging by the ZEUS detector

DIS charm cross sections

Speaker: Hartmut Stadie (Univ. Hamburg)

Slides stadie.pdf

09:20 Charm production in DIS (H1,new HERA-II)

Charm

Speaker: Katerina Lipka (DESY)

Slides lipka_dis07.pdf

09:40 D+ cross sections in DIS using the ZEUS Micro Vertex Detector

.

Speaker: Daniel Nicholass (UCL London)

Slides DIS07_dannicholass.pdf

10:00 Charm production with jets at H1

Charm

Speaker: Sebastian Schmidt (DESY)

Slides DIS2007.pdf

10:20 Charm fragmentation function and fragmentation fraction of charmed mesons at ZEUS

D meson

Speaker: Shuangshi Fang (DESY)

Slides charm_2ff_dis07.pdf

09:00 → 10:40 Hadronic Final States and QCD: 1

09:00 High momentum hadron and jet production in photon-photon collisions (LEP2)

High momentum hadron and jet production in photon-photon collisions (LEP2)

Speaker: Attila Krasznahorkay (CERN)

Slides LEP2_hadrons_jets.pdf.pdf

09:20 Status of e+e- to 3 jets at NNLO

Status of e+e- to 3 jets at NNLO

Speaker: Aude Gehrmann (ETH, Zuerich)

Slides gehrmann.pdf.pdf

09:40 Isolated photons in DIS at HERA (H1)

Isolated photons in DIS at HERA (H1)

Speaker: Katharina Mueller (University Zuerich)

Slides isolphotons.pdf.pdf

10:00 Measurement of prompt photons with associated jets in photoproduction at HERA (ZEUS)

Measurement of prompt photons with associated jets in photoproduction at HERA (ZEUS)

Speaker: Sergei Chekanov (ANL/DESY)

Slides prphDIS07.pdf

10:20 D0 measurement of triple differential photon+jet cross sections

D0 measurement of triple differential photon+jet cross sections

Speaker: Oleksiy Atramentov (Florida State University)

Slides dis2007_atramentov.pdf

09:00 → 10:40 Structure Functions and Low-x: 1

09:00 H1 low Q2 DIS cross-section measurement

.

Speaker: Andrea Vargas (DESY)

Slides dis07muenchen.pdf dis07muenchen.pdf

09:20 ZEUS high-y cross-section measurement and preparation for low energy runs

Speaker: Shima Shimizu (University of Tokyo)

Slides dis07_shimizu.pdf

09:40 H1 high y DIS cross-section measurement and preparation for low energy runs

.

Speaker: Natasa Raicevic (University of Montenegro)

Slides DIS2007raicevic.pdf

10:00 Constraints on PDF from CDF

Speaker: Aidan Robson (Glasgow University)

Slides dis07_robson_cdfpdf.pdf

10:20 Constraints on PDF from D0

Speaker: Terrence Toole (University of Maryland)

Slides dis2007_toole_D0_PDF_Constraints.pdf

09:00 → 10:40 Spin Physics: 1

09:00 Overview on polarised PDFs

Overview on polarised PDFs

Speaker: Johannes Blümlein (Desy Zeuthen)

Slides SPIN07.pdf

09:20 The deuteron spin-dependent structure function g_1^d

Results on the deuteron longitudinal inclusive spin-dependent asymmetryA_1^d and the spindependentstructure function g_1^d are presented. The data have been collected by the COMPASS experiment at CERN during the years 2002-2004 using 160 GeV/c polarised muon beam scattered off a polarised 6LiD target. The obtained values for Gamma_1^d, the first moment of g_1^d(x), and for the flavor-singlet axial current matrix element, a_0 are also shown. The results of the QCD fits in the NLO approximation on allg_1 deep inelastic data are presented.

Speaker: Krzysztof Kurek (Soltan Institute for Nuclear Studies)

Slides kurek_dis2007.pdf

09:40 The final HERMES data on g1p and g1n

Precise measurements of the spin structure functions $g_1^^p(x,Q2)$ and $g_1^n(x,Q2)$ are presented over the kinematic range 0.0041 $\leq x \leq $ 0.9 and 0.18 GeV$^2$ $\leq Q2 \leq $ 20 GeV$^2$. The data were collected at the HERMES experiment at DESY, in deep-inelastic scattering of 27.6 GeV longitudinally polarized positrons off longitudinally polarized hydrogen and deuterium gas targets internal to the HERA storage ring. The results base on a refined analysis and are corrected for radiative and detector smearing effects using an unfolding algorithm that accounts for the kinematic migration of events. The presently most precise determination of the neutron spin structure function g_1^n is obtained by combining the HERMES deuteron and proton data. Integrals of g_1^p, g_1^d and g_1^n are calculated over the measured x range, at Q2=5 GeV^2. Neglecting any possible contribution to the g_1^d integral from the regionx<= 0.021, a value of 0.330 +- 0.011 (theo.) +- 0.025 (exp.) +- 0.028 (evol.) is obtained for the flavor-singlet a_0 in a leading twist NNLO analysis

Speaker: Lara De Nardo (DESY / TRIUMF)

Slides denardo.pdf denardo.ppt

10:00 Polarized parton densities and higher twist in the light of the recent CLAS and COMPASS data

The results of a new NLO QCD analysis of the world data on inclusive polarized DIS are presented. The very precise CLAS proton and deuteron data, as well as the latest COMPASS data on the asymmetry $A_1^d$ were included in the analysis, and the impact of these data on polarized parton densities and higher twist effects has been studied. It is demonstrated that the low Q^2 CLAS data improve essentially our knowledge of higher twist corrections to the spin structure function g_1, while the large Q^2 COMPASS data influence mainly the strange quark density. It is also shown that a negative polarized gluon density, or one that changes a sign as a function of x, cannot be ruled out on the basis of the present DIS data.

Speaker: Dimitar Stamenov (INRNE, Sofia)

Slides Stamenov.pdf

10:20 Spin structure functions at CLAS

The CLAS Collaboration at Jefferson Lab has a sustained and comprehensive program measuring the spin structure function g_1 for the proton and deuteron at low and intermediate Q2. Precise data with extensive kinematic coverage allow us to better constrain the polarized parton distributions and to accurately determine various moments of g_1 as a function of Q2. Our latest results will be shown, emphasizing comparisons with NLO global fits, chiral perturbation theory, higher-twist expectations, the GDH and Bjorken sum rules, and hydrogen hyperfine splittings.

Speaker: Keith Griffioen (College of William & Mary)

Slides CLASssfDIS07.pdf

10:40 → 11:10 Coffee/Tea

11:10 → 12:50 Diffraction and Vector Mesons: 2

11:10 Status of dPDF fits

Speaker: Christophe Royon (DAPNIA-SPP, CEA Saclay)

Slides dis2007_rjj.pdf

11:30 The ratio of sigma_L/sigma_T in DIS at low x

Dear organizers, I would be happy to present a contribution "on the ratio of Sigma(long.) to Sigma(trans.) in Dis at low x" , i.e. F(long), predictions based on unpublished investigations by Kuroda and myself. For my earlier related work kindly look at e.g. hep ph/0607031, hep ph 0511091, and hep ph/ 0203028 etc. In view of the measurements being prepared at Hera on the long. structure function this is an important subject to be presented. With best regards Dieter Schildknecht

Speaker: Dieter Schildknecht (University of Bielefeld and MPI Munich)

Slides schildknecht.pdf.pdf

11:50 Endpoint singularities in unintegrated parton distributions

Speaker: Francesco Hautmann

Slides altered.pdf

12:10 Photoproduction of pi0 at HERA and the Odderon

Photoproduction of pi0 at HERA and the Odderon

Speaker: Carlo Ewerz (ECT* Trento)

Slides dis07_ewerz.pdf

12:30 Discussion

11:10 → 13:00 Heavy Flavors: 2 - Heavy quark production

Convener: Michael Klasen (University of Grenoble)

11:10 Open heavy quark production

.

Speaker: Johannes Blümlein (DESY)

Slides blumlein1.pdf.pdf

11:35 Charm at CLEO-c

CLEO

Speaker: Kamal K. Seth (Northwestern Univ.)

Slides DIS07.pdf

12:05 Heavy flavor production (CDF/D0)

.

Speaker: Burkard Reisert (MPI München)

Slides HQatTevatron.pdf

12:35 Heavy quark mass effects in QCD and heavy quark parton distributions

Speaker: Wu-Ki Tung (Washington University)

Slides

• Hfl2.tung.pdf.pdf
• Hfl2.tung.ppt.pdf
• Hfl2.tung.ppt.ppt

11:10 → 12:50 Hadronic Final States and QCD: 2

11:10 Multijets and jets with rapidity gaps in Photoproduction (ZEUS)

Multijets and jets with rapidity gaps in Photoproduction (ZEUS)

Speaker: Alexander Savin (University of Wisconsin,Madison)

Slides dis07_savin.pdf dis07_savin.ppt

11:30 High-Et jets in Photoproduction (ZEUS)

High-Et jets in Photoproduction (ZEUS)

Speaker: Mr Hanno Perrey (Hamburg University)

Slides DijetsInPhP.pdf

11:50 Jet production measurements at D0

Jet Production Measurements at D0

Speaker: Jochen Cammin (Univ. Rochester)

Slides cammin-DIS2007.pdf.pdf

12:10 Accurate predictions for b-jets at the Tevatron and LHC

Accurate predictions for b-jets at the Tevatron and LHC

Speaker: Giulia Zanderighi (CERN)

Slides DISbjets.pdf

12:30 Measurement of the bb-bar jet cross section (CDF)

Measurement of the bb-bar jet cross section (CDF)

Speaker: Sofia Vallecorsa (University of Geneva)

Slides DIS07_bbjet_cross.pdf.pdf

11:10 → 12:50 Structure Functions and Low-x: 2

11:10 HERA low energy run

.

Speaker: Max Klein (University of Liverpool)

Slides 06.maxklein.pdf

11:30 Update on PDFs by MRST

.

Speaker: Robert Thorne (University College London)

Slides dis07mstw.pdf

11:50 Update on CTEQ global analyses

---

Speaker: Wu-Ki Tung (Washington University)

Slides

• Sf2.tung.pdf.pdf
• Sf2.tung.ppt.pdf
• Sf2.tung.ppt.ppt

12:10 Low-Q DIS data in global fit

.

Speaker: Sergei Alekhin (Institute for High Energy Physics, Protivino)

Slides alekhin.pdf

12:30 Impacts and constraints on PDFs at ATLAS

Speaker: Amanda Cooper-Sarkar (University of Oxford)

Slides atlasdis_07.pdf

11:10 → 12:50 Spin Physics: 2

11:10 Photoproduction of hadron pairs with high transverse momenta at fixed target experiments

We consider the photoproduction of two hadrons in polarized lepton-nucleon collisions in the framework of perturbative QCD. After illustrating how to obtain the experimentally relevant observables a detailed phenomenological study of the photoproduction of hadron pairs at high transverse momenta is presented. We show theoretical predictions for the relevant cross sections and double-spin asymmetries at HERMES and COMPASS kinematics as well as theoretical uncertainties and analyze the sensitivity of the asymmetries to the gluon polarization delta g in the nucleon.

Speaker: Christof HENDLMEIER (University of Regensburg)

Slides pairs.pdf

11:30 Determination of ΔG/G from HERMES Data on high-pT inclusive charged hadrons

HERMES has used a high statistics data sample of charged inclusive hadrons to measure double spin asymmetries as a function of p_T. From these asymmetries Delta g/g has been extracted in the region of 1<p_T<2 GeV, corresponding to x\approx0.2-0.3 The information on the background asymmetry and the subprocess kinematics has been obtained from a Leading Order Monte Carlo model and existing parametrizations of the spin dependent quark distributions. Values for Delta g/g have been calculated both as a function of the measured p_T and x. The results will be presented together with comparisons of the Monte Carlo and data and a study on the effects of varying the model's parameters.

Speaker: Patricia Liebing (RIKEN / BNL)

Slides DeltaG_DIS07.ppt

11:50 Determination of ΔG/G from open charm events at COMPASS

One of the main goals of the COMPASS experiment at CERN is the determination of the gluon polarisation in the nucleon, Delta G/G. It is determined from spin asymmetries measured in the scattering of 160GeV/c polarised muons on a polarised LiD target. The gluon is accessed by the selection of photon-gluon fusion events. A selection of PGF events can be obtained with charmed mesons in the final state. Their detection is based on the reconstruction of decayed D^* and D^0 mesons in the COMPASS spectrometer. The analysis method will be discussed and the final result for Delta G/G from the open charm channel for the 2002-2004 data taking period will be presented.

Speaker: Susanne Koblitz (Institut fuer Kernphysik / Universitaet Mainz)

Slides dis07_koblitz.pdf.pdf

12:10 Study of proton helicity structure in polarized p+p collisions at PHENIX

To study the proton spin structure, the Relativistic Heavy Ion Collider (RHIC) at BNL provides a unique opportunity by colliding polarized protons. The hard subprocesses in proton-proton collisions involve gluons in leading order, therefore measurements of cross section asymmetries between aligned and anti aligned proton helicities give us information about the spin dependent gluon distribution, which might hold the longstanding missing proton spin component. For the longitudinal spin program, the PHENIX experiment accumulated about 10/pb of data at sqrt(s)=200GeV with roughly 60% proton beam polarization and 0.1/pb of data at sqrt(s)=62GeV with 50% polarization. Up until now, we have performed spin asymmetry measurements focusing on pi0 production with the central electromagnetic calorimeters. Despite low integrated luminosity, it was shown that the sqrt(s)=62GeV data have comparable sensitivity to the gluon polarization through the high x_T=2p_T/sqrt(s) region. In addition, various channels such as partial jets, charged pions, direct photons in the central rapidity region, large rapidity J/psi's through the muon channel and pi0's in a newly installed large rapidity electromagnetic calorimeter will provide complementary results. We also measure double helicity asymmetries of the average intrinsic k_T by 2-particle correlations,which may be sensitive to the partonic orbital angular momentum, another possible contribution to the proton spin. In this talk, we report recent results and plans of the PHENIX longitudinal spin program.

Speaker: Kensuke Okada (Riken / BNL)

Slides okada_dis2007.pdf

12:30 Longitudinal double spin asymmetry and cross-section of jet production in polarized p+p collisions at 200GeV

Recent STAR results on jet production in polarized p+p collisions at 200GeV at RHIC

Speaker: Renee Fatemi (MIT)

Slides Fatemi_DIS.pdf

12:50 → 14:00 Lunch

14:00 → 15:40 Diffraction and Vector Mesons: 3

14:00 Leading neutron production with ZEUS

Speaker: William Schmidke (MPI for Physics, Munich)

Slides LN.pdf.pdf

14:20 Recent results on diffraction with CDF

Recent results on diffraction with CDF

Speaker: Christina Mesropian (Rockefeller University, New York)

Slides mesropian_DIS2007.pdf.pdf

14:40 New theoretical results in central exclusive diffractive processes

New theoretical results in central exclusive diffractive processes

Speaker: Andy Pilkington (University of Manchester)

Slides DIS2007-Physics.pdf

15:00 Diffractive pp scattering and the unitarity limit

Diffractive pp scattering and the unitarity limit

Speaker: Christian Weiss (J-Lab)

Slides diffr_weiss.pdf

14:00 → 15:50 Heavy Flavors: 3 - Heavy ions

Convener: Rainer Mankel (DESY)

14:00 J/psi suppression measurements by the PHENIX experiment at RHIC

Heavy ion collisions provide a unique experimental way to create and characterize the hot and dense matter that lattice QCD predicts to be produced at high energy density and temperature. Products of hard processes, which take place in the early stage of the collision, are highly sensitive probes to the evolution of the created system. Suppression of the quarkonium J/\psi, which constitutes such a probe, has been measured by the PHENIX experiment at RHIC in AuAu, CuCu, dAu and pp interactions, as a function of impact parameter, rapidity and transverse momentum. The strong suppression factors observed in central collisions in heavy ion systems suggest that cold nuclear matter effects such as shadowing and nuclear absorption are not the only mechanisms involved. On the other hand, suppression due to color screening effects alone seems to overestimate the suppression measured both at forward rapidity and at mid rapidity. PHENIX also measures a stronger suppression at forward rapidity compared to the one measured at mid rapidity. Regeneration has been suggested as a possible explanation for these observations. Here, models that combine in different ways a regeneration scenario with color screening and cold nuclear effects will be compared to the data. Higher luminosities are expected to bring more information in the future by allowing to perform differential measurements in other variables.

Speaker: Ermias T. Atomssa (LLR, Ecole Polytechnique)

Slides ErmiasAtomssa.pdf

14:30 Measurements of heavy quark production via single leptons in p+p and Au+Au collisions at sqrt(s) = 200 GeV

The measurement of heavy flavor production at \sqrt{s_{NN}} = 200 GeV in both p+p and Au+Au collisions by the PHENIX Experiment at RHIC provides for complimentary physics exploration in differing collision environments. The measurement of single leptons resulting from the semi-leptonic decay of heavy flavor (charm and bottom) mesons in p+p collisions permits tests of pQCD predictions at \sqrt{s} = 200 GeV, as well as a measurement of a total charm cross section. The measurements for p+p collisions also provide a key baseline against which the analogous single lepton measurements for Au+Au collisions can be quantified. The dense partonic matter produced in Au+Au collisions can be investigated through the simultaneous measurement of the azimuthal anisotropy v2(p_T ) and the nuclear modification factor R_{AA}(p_T ). In the context of existing predictions, the observed flow and energy loss of heavy quarks, in addition to that already seen for light mesons, suggest that the matter formed in Au +Au collisions at RHIC is a near-perfect fluid. The most recent PHENIX single electron results from p+p and Au+Au collisions for 0.3 < p_T < 9.0 GeV/c at | y |< 0.35 are shown. Additionally, the latest PHENIX results for the measurement of heavy flavor production via single muons at 1.5 < | y | < 1.8 in \sqrt{s} = 200 GeV p+p collisions are presented.

Speaker: Donald Hornback (Univ. Tennessee)

Slides dis_dehornback_v5.pdf dis_dehornback_v5.ppt

15:00 Recent heavy flavor results from STAR

STAR

Speaker: Andre Mischke (Univ. Utrecht)

Slides DIS2007_A.Mischke.pdf DIS2007_A.Mischke.ppt

14:00 → 15:40 Hadronic Final States and QCD: 3

14:00 Charged Current jets in HERA II (ZEUS)

Charged Current jets in HERA II (ZEUS)

Speaker: Homer Wolfe (University of Wisconsin, Madison)

Slides DIS07_Multijets_in_CC.pdf

14:20 Measurements of W+jet(s) and Z+jet(s) production cross sections at CDF

Measurements of W+jet(s) and Z+jet(s) production cross sections at CDF

Speaker: Monica D'Onofrio (IFAE Barcelona)

Slides 12.Monica_D'ONOFRIO.pdf

14:40 Combining QCD and electroweak corrections to W-boson production at hadron colliders

Combining QCD and electroweak corrections to W-boson production at hadron colliders

Speaker: Alessandro Vicini (Milano University)

Slides vicini.pdf.pdf

15:00 Subjet distributions and three jets angular correlations in DIS (ZEUS)

Subjet distributions and three jets angular correlations in DIS (ZEUS)

Speaker: Elias Ron (UAM)

Slides Ron.pdf

15:20 Dijet azimuthal correlations in QCD hard processes

Dijet azimuthal correlations in QCD hard processes

Speaker: Yazid Delenda (The University of Manchester)

Slides Yazid_Delenda.pdf

14:00 → 15:40 Joint: Structure Functions and Low-x / Electroweak Measurements (Including Top): SF-3 / EW-1

14:00 NC cross section with polarized e-p

.

Speaker: Sampa Bhadra (York University)

Slides DIS_munich_apr13.pdf

14:20 QCD/EW combined fit

.

Speaker: Gang Li (Orsay)

Slides DIS07_LG.pdf

14:40 Charged current DIS at three loops

---

Speaker: Mikhail Rogal (DESY)

Slides DIS2007Rogal.pdf

15:00 Recent results from NuTeV

Speaker: Voica Radescu (DESY)

Slides dis07.pdf

14:00 → 15:40 Spin Physics: 3

14:00 Longitudinal double spin asymmetry and cross-section of neutral and charged pion production in polarized p+p collisions at 200GeV

Recent STAR results on hadron production in polarized p+p collisions at 200GeV at RHIC

Speaker: Frank Simon (MIT)

Slides DIS07FSimon.pdf

14:20 Valence quark polarization from COMPASS

A first evaluation of the polarized valence quark distribution\Delta u_v(x)+Delta d_v(x) from the COMPASS experiment (CERN/SPS) is presented. The data were collected by COMPASS in the years 2002--2004 using a 160 GeV polarized muon beam scattered off a large polarized 6LiD target and cover the range 1< Q2 < 100(GeV/c)2 and $0.006<x<0.7. The analysis is based on the difference asymmetry, A^(h+ - h-), for hadrons of opposite charges. This approach gives a direct access to the valence quark helicity distributions because fragmentation functions cancel out in LO QCD, so that the expression for the difference asymmetry is given by the ratio of polarized to unpolarized valence quark distributions. Due to this very weak sensitivity to uncertainties coming from the fragmentation, the results derived from A^(h+ - h-) can be used as a crosscheck for those obtained from single hadron asymmetries as in the SMC and HERMES analyzes.

Speaker: Alexander Korzenev (Mainz University)

Slides korzenev_DIS07.pdf

14:40 Polarization as a tool to study baryon resonances.

A comprehensive program with polarized electron and photon probes with unpolarized and polarized proton and duteron targets is undergoing at JLab. Results and perspectives will be reported.

Speaker: Philip Cole (Idaho State University)

Slides dis07-PhilCole.pdf.pdf

15:00 Nucleon resonances spin structure

We have measured the spin structure of the nucleon in the region of the resonances (final state mass W <2 GeV) at intermediate four-momentum transfer Q2 ~ 1.3 (GeV/c)2. Double-spin inclusive asymmetries for longitudinally polarized 5.75 GeV electrons incident on longitudinal and transverse solid polarized targets were measured in Jefferson Lab's Hall C. Frozen ammonia and deuterated ammonia were used as the polarized materials. The neutron spin structure is extracted from the proton and deuteron asymmetries. We present new results for the proton and deuteron spin asymmetries A1 and A2 and spin structure functions g1 and g2, and preliminary results for the neutron asymmetries. Sum rules for the spin structure functions (extended Gerasimov-Drell-Hearn, Burkhardt-Cottingham, third mo- ments of g2-bar(x) = g2(x) - g_2^(twist-2) (x), Bjorken and Efremov-Leader- Teryaev) have been calculated and are compared to theoretical pre- dictions. These are the first measurements of the transverse proton and deuteron spin structure in the resonances.

Speaker: Karl Slifer (University of Virginia)

Slides dis07_slifer.pdf

15:20 Theoretical description of the spin structure function g1 at small x and arbitrary Q2

Standard Approach (SA) for description of $g_1$ is based on the DGLAP evolution equations and the special fits for the initial parton densities. SA accounts for the total resummation of logs of $Q2$ and lacks the total resummation of leading $ln(1/x)$. In order to meet the small -$x$ experimental data, SA includes phenomenological singular factors in the fits. They mimic the resummation of ln(1/x) and lead to the steep rise of g_1 at small x . When the resummation is accounted for, the fits can be drastically simplified. The further advantage of our approach lays in analysis of DIS at small Q2. Indeed, DGLAP cannot be applied to the region of small Q2 presently studied by COMPASS collaboration. Contrary to it, our approach works in this kinematics and predicts a very week x-dependence of g_1 at small Q2 even at very small values of x. Instead, experimental investigation of the g_1 dependence on the invariant energy 2pq would extremely interesting because it allows one to estimate the impact of the gluon initial density.

Speaker: Boris Ermolaev (Ioffe Physico-Technical Institute)

Slides ermolaev-_dis07.pdf

15:40 → 16:10 Coffee/Tea

16:10 → 18:10 Heavy Flavors: 4 - Spectroscopy & Rare Decays

Convener: Stephanie Hansmann-Menzemer (University of Heidelberg)

16:10 Multiquark spectroscopy

Multiquark

Speaker: Jean-Marc Richard (LPSC Grenoble)

Slides 13-JeanMarcRichard.pdf

16:40 B spectroscopy (CDF/D0)

.

Speaker: Martin Heck (IEKP Karlsruhe)

Slides BSpec_Tevatron_corr.pdf

17:00 New resonances and meson spectroscopy (BaBar/Belle)

.

Speaker: Vincent Poireau (LAPP Annecy)

Slides DIS2007.pdf DIS2007.ppt

17:20 Bs mixing and lifetime difference (CDF/D0)

Bs

Speaker: Robert Kehoe (Southern Methodist Univ.)

Slides BsLifeMix.pdf

17:50 Rare decays at the B factories (BaBar/Belle)

.

Speaker: Ivo Eschrich (UC Irvine)

Slides ivoDIS2007.pdf

16:10 → 18:00 Hadronic Final States and QCD: 4

16:10 Dimensional reduction applied to QCD at three loops

Dimensional reduction applied to QCD at three loops

Speaker: Robert Harlander (Bergische Universität Wuppertal)

Slides dis2007.pdf

16:30 Towards precision determination of the unintegrated gluon distribution from HERA data

.

Speaker: Hannes Jung (DESY)

Slides updfs.pdf

16:50 Inclusive jet production in DIS at high Q2 and extraction of alphas HERA-I (H1)

Inclusive Jet Production in DIS at High Q2 and extraction of alphas HERAI+HERAII (H1)

Speaker: Thomas Kluge (DESY)

Slides kluge1.pdf.pdf

17:10 Inclusive and multi jet production in DIS at low Q2 and extraction of alphas HERA (H1)

Inclusive and Multi Jet Production in DIS at Low Q2 and extraction of alphas at HERA (H1)

Speaker: Artem Baghdasaryan (Yerevan Physics Institute)

Slides DIS_2007.pdf DIS2007.pdf

17:30 Inclusive jets and dijets in DIS and jet radius dependence and alpha_s (ZEUS)

Inclusive jets and dijets in DIS and Jet radius dependence and alpha_s (ZEUS)

Speaker: Thomas Schoerner-Sadenius (Hamburg University)

Slides schoerner_dis07.pdf.pdf

16:10 → 18:10 Joint: Structure Functions and Low-x / Diffraction and Vector Mesons: SF-4 / DIFF-4

16:10 Saturation model for exclusive processes at HERA, DVCS, F2, including evolution and the impact parameter dependence

Saturation model for exclusive processes at HERA, DVCS, F2, including evolution and the impact parameter dependence

Speaker: Henri Kowalski (DESY)

Slides 16-Kowalski.pdf 16-Kowalski.ppt

16:30 Target mass corrections to deep inelastic diffractive scattering

Target mass corrections to deep inelastic diffractive scattering

Speaker: Johannes Blümlein (Desy Zeuthen)

Slides diffr.pdf

16:50 Small x gluon from exclusive J/psi production

Small x gluon from exclusive J/psi production

Speaker: Thomas Teubner (University of Liverpool)

Slides ttdis07.pdf

17:10 Compatibility of phenomelogical dipole cross sections with the BK equation

Compatibility of phenomelogical dipole cross sections with the BK equation

Speaker: Andre Utermann (Vrije Universiteit Amsterdam)

Slides utermann.pdf.pdf

17:30 Universality of QCD traveling waves with running coupling

Universality of QCD traveling waves with running coupling

Speaker: Robert Peschanski (Service de Physique Théorique, Saclay)

Slides universal_running_bis.pdf

17:50 Discussion

16:10 → 18:10 Spin Physics: 4

16:10 Fragmentation function measurements at BELLE

In order to obtain precise information on helicity and transversity distributions from semi-inclusive measurements in DIS and proton-proton collisions a good knowledge of fragmentation functions is necessary. The Belle experiment at the asymmetric e+e- collider KEKB can provide precise spin averaged and spin dependent fragmentation functions such as the Collins function and the interference fragmentation function. Recent results will be shown.

Speaker: Ralf Seidl (University of Illinois at Urbana-Champaign)

Slides spin_seidl.pdf.PDF

16:30 HERMES measurement of the Collins and Sivers asymmetries from a transversely polarized hydrogen target

In 2005 the HERMES collaboration published first evidence for azimuthal single-spin asymmetries in semi-inclusive production of charged pions on a transversely polarised hydrogen target. The measured asymmetries are caused by both the Collins and the Sivers mechanisms. Their distinctive Fourier components provide signals to previously unmeasured quantities: the transversity quark distribution in conjunction with the Collins fragmentation function (Collins mechanism/asymmetry) and the Sivers parton distribution (Sivers mechanism/asymmetry). The transversity distribution will provide a detailed insight into the relativistic nature of the quarks inside the nucleon. Continuous theoretical work could relate the Sivers function to the contribution of the orbital angular momentum of both quarks and gluons to the spin of the nucleon. The presented results for charged pions have a much higher statistical significance than the published data, and are accompanied by the measurement of the Collins and Sivers asymmetries for charged kaons.

Speaker: Markus Diefenthaler (Physikalisches Institut II, Friedrich-Alexander-Universität)

Slides diefenthaler-dis07.pdf.pdf

16:50 Single hadron Collins and Sivers measurements by COMPASS

The CERN COMPASS experiment is on the floor collecting data since 2002; in the years 2002, 2003, and 2004 data were collected using a 160 GeV polarized muon beam and a 6LiD polarized target. In about 20% of the running time the target polarisation was oriented transversely with respect to the muon beam direction to measure transverse spin effects in semi inclusive deep inelastic scattering, one of the main objectives of the COMPASS spin program. Here the results for the Collins and the Sivers asymmetries, both for unidentified and identified hadrons (pi+, pi−, K± and K0) from the whole data sample are presented, together with the projected statistical error for the proton run foreseen in 2007. The measured asymmetries on the 6LiD target are small and compatible with zero within the few percent statistical errors, an important result which can be interpreted as cancellation between u and d quark in the deuteron and which allows to better constrain the parton distribution functions.

Speaker: Andrea Bressan (INFN Trieste)

Slides bressan_dis07.pdf bressan_dis07.ppt

17:10 Transversity and Collins functions: from e+e- to SIDIS processes

We present a global analysis of azimuthal asymmetries in e^+e^- -> h_1 h_2 X processes (BELLE data) and in semi-inclusive deep inelasticscattering (HERMES and COMPASS data). It results in the extraction of the Collins fragmentation function and of the transversity distribution function for u and d quarks. Theseturn out to have opposite signs and to be sizably smaller than their positivity bounds. Predictions for the azimuthal asymmetry A_{UT}^{\in(phi_h + phi_S) for polarized proton target at JLAB and COMPASS experiments are give

Speaker: Umberto D'Alesio (Dipartimento di Fisica, Cagliari University)

Slides dalesio-spin4.pdf

17:30 Transverse quark spin effects in SIDIS

This talk will focus on transverse quark spin effects in SIDIS. I will discuss the theoretical T-odd input to the cos 2\phi azimuthal asymmetry as well as new work on the Collins function and the Boer Mulders function, the essential TMD inputs to this asymmetry. We will present new estimates of the cos2\phi asymmetry as a function of P_T, x, and z. I will also talk a bit about the progress we have made on universality of the Collins Function.

Speaker: Leonard Gamberg (Penn State Berks, Dept. of Physics)

Slides dis07.pdf

18:30 → 20:00 Alpha_s: Informal Discussion Session on alpha_s

18:30 Summary of non-DIS measurements

Speaker: Siegfried Bethke (MPI for Physics, Munich)

18:40 Summary of ZEUS results from inclusive and final states

Speaker: Claudia Glasman

Slides dis07_glasman.pdf

18:50 Summary of H1 results from inclusive and final states

Speaker: Thomas Kluge (DESY)

Slides kluge2.pdf.pdf

19:00 DIS global analyses

Speaker: Johannes Blümlein (Desy Zeuthen)

Slides alpha.pdf

19:10 Running Couplings From Lattice QCD

Speaker: Peter Weisz

Slides WeiszPeterAlphaS.pdf.pdf

Wednesday 18 April

08:00 → 09:00 Breakfast

09:00 → 11:00 Diffraction and Vector Mesons: 5

09:00 Diffractive DIS from the CGC approach with Pomeron loops

Speaker: Cyrille Marquet (RIKEN / BNL)

Slides dis_marquet.ppt

09:20 Exclusive Vector Meson production

Exclusive Vector Meson production

Speaker: Aharon Levy (DESY / Tel Aviv University)

Slides

• rho-dis07-talk.pdf
• rho-dis07-talk.pdf
• rho-dis07-talk.ppt

09:40 VM production from non-forward BK equation

VM production from non-forward BK equation

Speaker: Robert Peschanski (Service de Physique Théorique, Saclay)

Slides DIS_2_2007_bis.pdf

10:00 Vector Meson production from NLL BFKL

Vector Meson production from NLL BFKL

Speaker: Dima Ivanov (Sobolev Institute of Mathematics, Novosibirsk)

Slides dis07-ivanov.pdf

10:20 The longitudinal cross section of VM electroproduction

The longitudinal cross section of VM electroproduction

Speaker: Peter Kroll

Slides DIS07-kroll.pdf DIS07-kroll.pdf

09:00 → 10:40 Electroweak Measurements (Including Top) and Beyond the Standard Model: 2

09:00 Diboson physics at Tevatron

Diboson physics at Tevatron

Speaker: Yurii Maravin (Kansas State University, DZERO)

Slides maravin_DIS2007_diboson.pdf maravin_DIS2007_diboson.pdf

09:20 W mass (and width) from Tevatron

W mass (and width) from Tevatron

Speaker: Sarah Malik (UC London, CDF)

Slides 02_Malik.pdf

09:40 Top cross-section and production properties

Top cross-section and production properties

Speaker: Cecilia Gerber (University of Illinois, Chicago, DZERO)

Slides DIS2007.pdf

10:00 Top mass and decay properties

Top mass and decay properties

Speaker: Jeannine Wagner (TU Karlsruhe, CDF)

Slides DIS_top_MassDecay_April07_2.pdf

10:20 Single top physics and spin correlations with MC@NLO

Single top physics and spin correlations with MC@NLO

Speaker: Patrick Motylinski (NIKHEF)

Slides Munich_Apr_2007.pdf

09:00 → 11:00 Heavy Flavors: 5 - Charmonium production

Convener: Michael Klasen (University of Grenoble)

09:00 Review on Charmonium production

.

Speaker: Katja Krüger (Univ. Heidelberg)

Slides krueger.pdf

09:30 B and Upsilon cross sections (HERA-B)

.

Speaker: Antonello Sbrizzi (INFN Bologna)

Slides 02.Antonello_Sbrizzi.pdf

09:50 Charmonium production & charm (BaBar/Belle)

.

Speaker: Galina Pakhlova (ITEP Moscow)

Slides G.Pakhlova_Charm_DIS_ver1.pdf G.Pakhlova_Charm_DIS_ver1.ppt

10:20 Quarkonium decay

.

Speaker: Alistair Hart (Univ. Edinburgh)

Slides hart_alistair_slides.pdf.pdf

09:00 → 11:00 Hadronic Final States and QCD: 5

09:00 Mini jets and a study of the underlying events in DIS at HERA (H1)

Mini Jets and a study of the Underlying events in DIS at HERA (H1)

Speaker: Sakar Osman (University of Lund)

Slides MainDIS2007.pdf sakar.DIS2007.pdf.pdf

09:20 Jet fragmentation studies at CDF

Jet fragmentation studies at CDF

Speaker: Lester Pinera (University of Florida)

Slides JetfragCDF_DIS2007.pdf.pdf

09:40 Prospects for inclusive jet cross section measurement with early data in ATLAS

Prospects for inclusive jet cross section measurement with early data in ATLAS

Speaker: Daniel Clements (University of Glasgow)

Slides InclJets_ATLAS_Clements.pdf

10:00 Angular ordering and parton showers for non-global QCD observables

Angular ordering and parton showers for non-global QCD observables

Speaker: Mrinal Dasgupta (The University of Manchester)

Slides hfs-dasgupta.pdf.pdf

10:20 Power corrections for jet distributions at hadron colliders

Power corrections for jet distributions at hadron colliders

Speaker: Lorenzo Magnea (University of Turin)

Slides magnea.pdf.pdf

10:40 Three-jet event-shapes: first NLO+NLL+1/Q results

Three-jet event-shapes: first NLO+NLL+1/Q results

Speaker: Andrea BANFI (Universita' Milano-Bicocca)

Poster banfi-summary.pdf

Slides banfi-3jets.pdf

09:00 → 10:40 Structure Functions and Low-x: 5

09:00 Three and four jet production in DIS and low x parton dynamics at HERA

.

Speaker: Grazyna Nowak (The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Science)

Slides dis2007_3_4jets.pdf

09:20 Forward jet production in DIS

.

Speaker: Lev Khein (Moscow State University)

Slides

• khein_dis07.pdf
• khein_dis07.ppt
• khein_dis07.ppt
• khein_dis07.ppt.pdf
• khein_dis07.ppt.ppt

09:40 Forward jet at HERA and and Mueller Navelet jets at LHC

.

Speaker: Christophe Royon (DAPNIA-SPP, CEA Saclay)

Slides dis2007_mnjet.pdf

10:00 Low-x multijets in DIS

.

Speaker: Tom Danielson (University of Wisconsin)

Slides Danielson_DIS_2007.pdf

10:20 MC implementation of dipole model

.

Speaker: Emil Avsar (Lund University)

Slides DIS07.pdf

10:40 → 11:10 Coffee/Tea

11:10 → 12:50 Electroweak Measurements (Including Top) and Beyond the Standard Model: 3

11:10 Evidence for single top production

Evidence for single top production

Speaker: Shabnam Jabeen (Boston University, DZERO)

Slides SingleTopTevatron.pdf

11:30 Single top studies with MCFM

Single top studies with MCFM

Speaker: Francesco Tramontano (Universita di Napoli)

Slides FTramontano.pdf

11:50 Higher-order threshold corrections for single top quark production

Higher-order threshold corrections for single top quark production

Speaker: Nikolaos Kidonakis (Kennesaw State University)

Slides Kidonakis.pdf.pdf

12:10 First physics at ATLAS (incl. EW+top)

First physics at ATLAS (incl. EW+top)

Speaker: Anne-Catherine Le Bihan (CERN, ATLAS)

Slides First_physics_ATLAS_Le_Bihan.pdf

12:30 First physics at CMS (incl. EW+top)

First physics at CMS (incl. EW+top)

Speaker: Frank-Peter Schilling (TU Karlsruhe, CMS)

Slides 20070418-dis07.pdf

11:10 → 12:50 Joint: Heavy Flavors / Diffraction and Vector Mesons: HFL-6 / DIFF-6

11:10 Inelastic J/psi in DIS (new HERA-II)

Inelastic J/psi in DIS (new HERA-II)

Speaker: Michael Steder (Univ. Hamburg)

Slides Steder.pdf

11:30 Bottonium production in the Regge limit

Bottonium production in the Regge limit

Speaker: Vladimir Saleev (Samara State Univ.)

Slides saleev_dis07.pdf.pdf

11:50 Charm production in diffractive DIS and PHP at ZEUS

Charm production in diffractive DIS and PHP at ZEUS

Speaker: Isabell Melzer (DESY)

Slides Melzer_DIS_2007.pdf Melzer_DIS_2007.ppt

12:10 D* and open charm in diffraction

D* and open charm in diffraction

Speaker: Paul Thompson (Univ. Birmingham)

Slides diffcharm.pdf

12:30 HFL production in DGLAP improved saturation model

HFL production in DGLAP improved saturation model

Speaker: Sebastian Sapeta (CERN / Jagellonian University Krakow)

Slides sapeta-dis07.pdf

11:10 → 12:50 Structure Functions and Low-x: 6

11:10 DGLAP and BFKL equations in the N=4 SUSY

---

Speaker: Lev Lipatov (Hamburg University)

Slides N4Munch.pdf

11:30 Anomalous dimensions of high-spin operators beyond the leading order

Anomalous dimensions of high-spin operators beyond the leading order

Speaker: Benjamin Basso (LPT, Orsay)

Slides 07-basso.pdf

11:50 Recent developments in small-x QCD evolution

.

Speaker: Arif Shoshi (Bielefeld University)

Slides shoshi.pdf.pdf

12:10 Inclusive multi-gluon production in DIS at low x

.

Speaker: Michael Lublinsky (Stony Brook University)

Slides dis_07_gluon.pdf

12:30 Critical tests of unintegrated gluon distributions

.

Speaker: Nikolai Zotov (SINP, Moscow State University)

Slides talkdis07.pdf

11:10 → 12:50 Spin Physics: 5

11:10 Measurement of transverse lambda polarization in quasi-real photoproduction at HERMES

Transverse Lambda and Lambda-bar polarization produced inclusively in quasi-real photon-nucleon scattering have been studied in the HERMES experiment using a 27.6 GeV positron beam incident on hydrogen and deuterium gas targets. The average transverse polarizations were found to be P^{Lambda}_n = 0.078 +- 0.006(stat) +- 0.012(syst) and P^{bar Lambda}_n = -0.025 +- 0.015(stat) +-0.018 (syst) for Lambda and barLambda, respectively. The dependence of P^{Lambda}_n on the transverse and longitudinal momenta of the Lambda hyperon has been studied.

Speaker: Yury Naryshkin (Petersburg Nuclear Physics Institute)

Slides naryshkin_dis07.pdf

11:30 Transverse spin phenomena in polarized p+p collisions at PHENIX

With recent experimental measurements of various asymmetries at HERMES[1], Belle[2], STAR[3], and BRAHMS[4] there has been a growing interest in the understanding of the transversely polarized proton structure. Theoretical explanations include different mechanisms, such as effects from the Sivers function, the Collins effect, higher twist contributions, or combinations of all of the above. In order to quantify contributions from competing mechanisms, measurements over a wide range of p_T and x_F are needed. PHENIX, one of the two large experiments the Relativistic Heavy Ion Collider (RHIC), has accumulated a substantial transversely polarized data set over the last few years. Measurements include inclusive single spin asymmetries at mid-rapidities at sqrt{s} = 200 GeV [5]. In 2006, new data sets of 2.7 pb^{-1} at srqt{s} = 200 GeV and 20 nb^{-1} at sqrt{s} = 62.4 GeV have been taken. A new calorimeter at large rapidity installed during the 2006 run allows PHENIX to measure an even broader spectrum of the probes proposed to help disentangle contributions from the various theoretical models. We present the status of the PHENIX measurements and how they can help to lead to a deeper understanding of the transverse proton spin structure. 1. A. Airapetian et al., Phys. Rev. Lett. 94, (2005) 012002. 2. R. Seidl et al., Phys. Rev. Lett. 96 (2006) 232002. 3. J. Adams et al., Phys. Rev. Lett. 92 (2004) 171801. 4. F. Videbaek et al., AIP Conf. Proc. 792 (2005) 993. 5. S.S. Adler et al., Phys. Rev. Lett. 95 (2005) 202001.

Speaker: K. Oleg Eyser (UC Riverside, DESY)

Slides PHENIX_transverse.pdf

11:50 Measurement of transverse spin effects with the forward pion detector at STAR in polarized p+p collisions at 200GeV

Speaker: Steven Heppelmann (Penn State)

Slides

• DIS07ForwardSpinHeppelmann_V2.pdf
• DIS07ForwardSpinHeppelmann_V2.ppt
• slides

12:10 Cross-sections and SSAs at high-xF at RHIC by BRAHMS

Single transverse spin asymmetries (SSA) in transversely polarised pp reactions at the energy regime where pQCD is applicable are expected to be negligibly small in the lowest-oredr QCD approximation, whereas experimentally large SSAs have been observed at high xF. Recently, new measurements of SSAs have been available from semi-inclusive deep-inelastic scattering and transversely polarised pp at RHIC providing more insight into th e fundamental mechanisms of SSAs as well as the relevant hadron structure. The BRAHMS experiment at RHIC has unique capabilities to explore the high xF kinematic region with particle identification. Measurements of cross sections and single-spin asymmetries of identified charged hadrons from transversely polarised proton collisions at sqrt(s)=62.4 and 200 GeV are presented. The results are discussed in the context of theoretical models based on pQCD. The energy and flavour dependent SSAs combined with the cross sections at high xF bring new insight into the pQCD description of partonic dynamics at RHIC.

Speaker: J.H. Lee (BNL)

Slides dis07.pdf dis07.pdf

12:30 Transverse spin structure of hadrons from lattice QCD

In this talk, we present recent results from lattice QCD on the transverse spin structure of hadrons. Strong correlations between spin, orbital angular momentum and coordinate degrees of freedom lead to strongly distorted densities of quarks in hadrons in particular for transverse quark polarizations. We discuss possible implications of our results for the Sivers and Boer-Mulders function of the nucleon and show first results on the spin structure of the pion.

Speaker: Philipp Haegler (TU Muenchen)

Slides

• DIS_2007_short_v2.ppt
• DIS_2007_short_v3.ppt
• DIS_2007_short_v4.ppt

11:20 → 13:00 Hadronic Final States and QCD: 6

11:20 Observation of (anti)deuterons in DIS (ZEUS)

Observation of (anti)deuterons in DIS (ZEUS)

Speaker: Sergei Chekanov (ANL/DESY)

Slides deuteronsDIS07.pdf

11:40 Search for baryonic states decaying to Xipi in DIS at HERA (H1)

Search for baryonic states decaying to Xipi in DIS at HERA (H1)

Speaker: Marc Del Degan (ETH Zurich)

Slides DIS07_mdd.pdf.pdf

12:00 Pentaquark search at CLAS

Pentaquark search at CLAS

Speaker: Patrizia Rossi (INFN)

Slides rossi_DIS07.pdf

12:20 Recent results from STAR

Recent results from STAR

Speaker: Mark Heinz (Yale University)

Slides DIS2007_heinz.pdf DIS2007_heinz.ppt

12:40 Hadronic final states and their correlations in pp and heavy ion collisions at PHENIX

Hadronic final states and their correlations in pp and heavy ion collisions at PHENIX

Speaker: Craig Ogilvie (Iowa State University)

Slides DIS07Ogilvie.pdf

12:50 → 14:00 Lunch

14:00 → 15:40 Joint: Diffraction and Vector Mesons / Spin Physics: DIFF-7 / SPIN-6

14:00 Exclusive meson production at NLO

I present a detailed study of exclusive meson production at large Q^2 in terms of generalized parton distributions, focusing at the effect of the NLO corrections to the hard scattering. Numerical investigations are performed for the kinematic regions of various experiments (from HERA collider to JLAB energies). I comment on the stability of the perturbative expansion in collinear factorization for this process.

Speaker: Markus Diehl (DESY)

Slides dis.pdf

14:20 Obtaining generalized parton distributions from hadronic observables and lattice QCD

We propose a physically motivated parametrization for the unpolarized Generalized Parton Distributions (GPDs), H and E, valid at both zero and non-zero values of the skewness variable, zeta. We start from a detailed study of the zeta = 0 case where H and E are determined using constraints from simultaneous fits of experimental data on both the nucleon elastic form factors and the deep inelastic structure functions [1]. Lattice calculations of the higher moments of GPDs [2,3] allow us in principle to constrain the parametrization at zeta > 0. Since lattice calculations are at present limited to large quark masses, we extrapolate to the chiral limit by using the technique devised in [4] to obtain the nucleon form factor dipole masses. We then perform a reconstruction of the GPDs using Bernstein polynomials. The inclusion in our fit, of recent precise Jefferson Lab data on Deeply Virtual Compton Scattering [5] is also discussed. Our method provides an alternative to the mathematical ansatz of double distributions in that GPDs are generated from direct constraints from experimental data combined with lattice calculations. [1] S. Ahmad, H. Honkanen, S. Liuti and S. K. Taneja, submitted to Phys.Rev. D, arXiv:hepph/ 0611046. [2] M. Gockeler et al. [QCDSF Collaboration], Phys. Lett. B 627, 113 (2005). [3] P. Hagler, J. Negele, D. B. Renner, W. Schroers, T. Lippert and K. Schilling [LHPC collaboration], Phys. Rev. D 68, 034505 (2003). [4] J. D. Ashley, D. B. Leinweber, A. W. Thomas and R. D. Young, Eur. Phys. J. A 19, 9 (2004) [5] C. Munoz Camacho et al. [Jeㄦson Lab Hall A Collaboration], arXiv:nucl-ex/0607029. [6] F. J. Yndurain, Phys. Lett. B 74, 68 (1978).

Speaker: Simonetta Liuti (University of Virginia)

Slides sl_gpd_dis07.pdf

15:00 Transverse target spin asymmetries of exclusive rho0 mesons at HERMES

Hard exclusive meson production in deep inelastic lepton scattering provides access to the unknown Generalized Parton Distributions (GPDs) of the nucleon. GPDs parameterize the nucleon structure and provide a unified description of exclusive and inclusive reactions. Predictions based on a GPD model have shown that the transverse target spin asymmetry of exclusive $\rho^0$ mesons is sensitive to the GPD $E$, and thus, to the total angular momentum of quarks. Hence, this transverse target spin asymmetry is a key observable to study the contribution of the orbital angular momentum of quarks to the spin of the proton. This talk will report on the preliminary measurement of the transverse target spin asymmetry of exclusive $\rho^0$ mesons on a polarized hydrogen target at HERMES using the $27.6$ GeV HERA positron beam. Since the factorization theorem is proved for longitudinally polarized photons only, a matter of theoretical interest is the asymmetry of $\rho^0$ mesons induced from longitudinal photons. The $\rho^0$ electroproduction data supports the fact that the $s$-channel helicity conservation holds to a good accuracy. This implies that a longitudinally polarized vector meson originates from a longitudinal polarized photon. Assuming the $s$-channel helicity conservation, the longitudinal polarization component of the $\rho^0$ production is obtained experimentally through its decay angular distribution. For the first time the longitudinal component of the transverse target spin asymmetry of exclusive $\rho^0$ mesons will be presented and compared to theoretical calculations.

Speaker: Armine Rostomyan (DESY)

Slides 14_Rostomyan.pdf

15:20 Are generalized and transverse momentum dependent parton distributions related?

Recent work suggests a close relation between generalized and transverse momentum dependent parton distributions (TMDs), in particular for the so-called naive time-reversal odd TMDs. In the talk our present knowledge on this topic will be briefly summarized. Moreover, an extension of the existing work in the literature will be discussed.

Speaker: Andreas Metz (Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum)

Paper DIS_metz.pdf

14:00 → 15:40 Electroweak Measurements (Including Top) and Beyond the Standard Model: 4

14:00 Measurements of the CKM sides at the B factories

Measurements of the CKM sides at the B factories

Speaker: Isamu Nakamura (KEK, Belle)

Slides nakamura.pdf

14:20 Measurements of angles of the unitarity triangle

Measurements of angles of the unitarity triangle

Speaker: Nick Barlow (University of Manchester, BaBar)

Slides nbarlow.pdf

14:40 Tau physics at the B factories

Tau physics at the B factories

Speaker: Hisaki Hayashii (Nara, Belle)

Slides dis07-hayashii.pdf

15:00 How To Kill a Penguin - Interplay between collider and flavor physics

How To Kill a Penguin - Interplay between collider and flavor physics

Speaker: Ulrich Haisch (University of Zurich)

Slides haisch_DIS07.pdf

14:00 → 15:40 Future of DIS: 1

14:00 Remaining expectations from H1 and ZEUS

Speaker: Olaf Behnke (University of Heidelberg)

Slides obehnke070418.pdf

14:20 Precision PDF measurements at the LHC

Speaker: Amanda Cooper-Sarkar (University of Oxford)

Slides futureDIS_07.pdf

14:45 Precision PDF measurements at the LHeC

Speaker: Max Klein (University of Liverpool)

Slides lhecpdfdis07.pdf

15:10 JLAb 12 GeV: Large x, spin/flavour and GPDs

Speaker: Zein-Eddine Meziani (Temple University)

Slides Meziani_DISF07.pdf

14:00 → 15:40 Hadronic Final States and QCD: 7

14:00 Exclusive hadronic final states and B decays at BABAR

Exclusive hadronic final states and B decays at BABAR

Speaker: Sepehr Saremi (University of Massachusetts)

Slides Saremi-DIS2007.pdf

14:20 Investigating the onset of Color Transparency with CLAS

Investigating the onset of Color Transparency with CLAS

Speaker: Maurik Holtrop (University of New Hampshire)

Slides Holtrop_CT_final.pdf

14:40 Final results from HERMES on hadronization in nuclear environment

Final results from HERMES on hadronization in nuclear environment

Speaker: Zaven Akopov (Yerevan Physics Institute)

Slides

• finalDIS.pdf
• finalDIS.ppt
• trial.pdf
• trial.pdf.pdf

15:00 Parton shower as QCD prediction

Parton shower as QCD prediction

Speaker: Zoltan Nagy (CERN)

Slides hfs-znagy.key.tar.gz hfs-znagy.pdf

15:20 MadGraph/MadEvent at work: from QCD backgrounds to new physics signals

MadGraph/MadEvent at work: from QCD backgrounds to new physics signals

Speaker: Simon de Visscher (Université Catholique de Louvain (UCL))

Slides dis2007.pdf

14:00 → 15:40 Structure Functions and Low-x: 7

14:00 Hadron structure physics in lattice QCD and EFT

.

Speaker: William Detmold (University of Washington)

Slides Detmold_SF7.1.pdf

14:20 Prompt photon production in pA collisions at LHC

.

Speaker: Thierry Gousset (Subatech-Universite de Nantes)

Slides tgousset.pdf.pdf

14:40 Unified approach to electron and nucleon scattering cross section

.

Speaker: Un ki Yang (University of Manchester)

Slides BY_dis07.pdf

15:00 A global fit to scattering data with NLL BFKL resummations

Speaker: Chris White (NIKHEF)

Slides white_id250.pdf

15:20 BFKL effects in azimuthal angle correlations of forward jets

Speaker: Agustin Sabio Vera (CERN)

Slides DIS07.pdf

15:40 → 16:10 Coffee/Tea

16:10 → 18:00 Joint: Diffraction and Vector Mesons / Spin Physics: DIFF-8 / SPIN-7

16:10 Measurement of coherent and incoherent DVCS at HERMES from nuclear targets

For the first time, azimuthal beam-spin asymmetries have been measured in electroproduction of a hard exclusive photon on nuclei ranging from Deuterium to Xenon. The data were accumulated by the HERMES experiment at HERA/DESY in the years 1996-2004 by scattering the 27.6 GeV lepton beam off an internal gas target. The asymmetries of the coherent and incoherent processes for D, 4He, N, Ne, Kr and Xe have been extracted and compared to the proton beam-spin asymmetry as a function of the Mandelstam variable $t$. The dependence on the atomic number $A$ of the ratio of the beam-spin asymmetry on nuclei to that on the proton is evaluated and compared to GPD model predictions.

Speaker: Hayg Guler (DESY)

Slides Talk_iko_DIS2007_new.pdf

16:30 HERMES measurement of DVCS from p and d targets, and status and prospects of the recoil detector

Hard exclusive processes provide access to the unknown generalized parton distributions (GPDs), which extend our description of the nucleon structure beyond the standard parton distributions. The Deeply Virtual Compton Scattering (DVCS) process, i.e. the hard exclusive leptoproduction of real photons, provides the theoretically cleanest access to the GPDs. DVCS amplitudes can be measured most readily through the interference between the Bethe-Heitler process and the DVCS process. Azimuthal cross-section asymmetries are generated by both the real and imaginary parts of the DVCS amplitude with respect to the charge and helicity of the incoming lepton, and with respect to the spin polarization of the target, either longitudinal or transverse with respect to the lepton beam. The accumulated HERMES data offers access to all of these spin and charge degrees of freedom, and the combined set of asymmetry measurements allows independent access to the four GPDs in different combinations. An overview of these results will be presented. In particular, a recent highlight has been the measurement of the DVCS azimuthal asymmetry using a transversely-polarized hydrogen target. This particular asymmetry is sensitivite to the GPD $E$, related via the Ji sum rule to the total angular momentum of quarks within the proton. By comparing the HERMES result and the theoretical predications based on the GPD model, a model-dependent constraint on $J_u$ and $J_d$ has been obtained. In late 2005, a Recoil Detector was installed at HERMES with the purpose of greatly improving the experiment's ability to measure hard-exclusive processes during its final running period. The status of this detector's operation and commissioning will be presented, along with rojections for the expected results.

Speaker: Andreas Mussgiller (University of Erlangen)

Slides mussgiller_hermes_recoil.pdf.pdf

16:55 DVCS in Hall A

I would like to bring your attention on the Hall A exprimental program about GPDs at JLab. Two experiments have been recently performed investigating GPDs via the DVCS reaction off the proton and off the neutron. They involve the HRS spectrometer for the detection of the scattered electron and a new PbF2 calorimeter for the detection of the emitted photon. The latter was specially designed to sustain luminosities of 4.10^37 cm^-2/s in the direct vicinity of the target, and at small angles. The difference between cross sections for opposite longitudinal polarization of the electron beam and the unpolarized cross secttion have been measured. The experiment on the proton provided strong indication supporting factorization at Q^2 as low as 2 GeV^2, therefore validating a GPD based analysis. The unpolarized cross section data provided evident deviations from the Bethe-Heitler cross section, leading to an integral measurement of GPDs. The experiment on a deuterium target provided first measurements of the DVCS off the neutron, particularly sensitive to the least know GPD E, and the DVCS off the deuton.Within a model dependent analysis, these data provide constraints on the u- and d-quark angular momentum.

Speaker: Eric Voutier (LPSC / Université Joseph Fourier)

Slides Voutier-DIS07.pdf.pdf

17:20 Double spin asymmetry for exclusive pi+ production

The eg1b run was conducted using CLAS (CEBAF Large Acceptance Spectrometer) at the Thomas Jeㄦson National Accelerator Facility (TJNAF) in 2000 by the CLAS collaboration. A 1.6 GeV - 5.6 GeV polarized electron beam and polarized nuclear targets (composed of NH3 and ND3) were used, allowing single and double spin asymmetries to be measured. This analysis is of the double spin asymmetry Ajj in the exclusive production of positive pions from a polarized proton (ep -> e pi+ n). The double spin asymmetry was measured as a function of the four kinematic variables W, Q2, cos Theta* (the angle between the lepton interaction plane and the hadron interaction plane). The value of this asymmetry can be used to help determine the spin structure of the resonances, due to its sensitivity to the spin dependent parts of the cross section. A brief description of the experimental setup will be given, and preliminary results for the asymmetry will be shown.

Speaker: Josh Pierce (University of Virginia)

Slides pierce_dis.pdf.pdf

16:10 → 18:00 Electroweak Measurements (Including Top) and Beyond the Standard Model: 5

16:10 SM Higgs searches at Tevatron

SM Higgs searches at Tevatron

Speaker: Rocio Vilar (IFCA, CDF)

Slides SMhiggs_DIS07.pdf

16:30 Searches for SUSY at Tevatron (incl. SUSY Higgs)

Searches for SUSY at Tevatron (incl. SUSY Higgs)

Speaker: Raimund Stroehmer (LMU Munich, DZERO)

Slides dis2007.pdf

16:50 Impact of new PDF sets on searches at the LHC

Impact of new PDF sets on searches at the LHC

Speaker: C.-P. Yuan (Michigan State University)

Slides impact_cpyuan.pdf.pdf

17:10 Prospects for Higgs and BSM searches at LHC

Prospects for Higgs and BSM searches at LHC

Speaker: Daniela Rebuzzi (University of Pavia, ATLAS)

Slides dis2007-rebuzzi_final.pdf

17:35 ILC physics prospects

ILC physics prospects

Speaker: Alexei Raspereza (MPI Munich)

Slides ILC_Physics-Raspereza.pdf

16:10 → 18:00 Future of DIS: 2

16:10 GPDs at COMPASS

Speaker: Fritz-Herbert Heinsius (Universitaet Bochum)

Slides fdis-heinsius-compass-gpd.pdf.pdf

16:25 Delta_G, spin/flavour and GPDs at EIC

Speaker: Antje Bruell (Jefferson Lab)

Slides 15.Antje_Bruell.pdf 15.Antje_Bruell.ppt

16:55 PANDA at GSI: Drell-Yan, transversity, exclusive channels

Speaker: Bjoern Seitz (University of Glasgow)

Slides PANDA_DIS2007_bseitz.pdf

17:15 BSM and electroweak physics at the LHeC

Speaker: Emmanuelle Perez (CERN)

Slides DIS07_Perez.pdf DIS07_Perez.ppt

17:40 Parity violating DIS at JLAB

Speaker: Krishna Kumar (University of Massachusetts)

Slides kumar_pvdis.pdf.pdf

16:10 → 18:00 Hadronic Final States and QCD: 8

16:10 Scaled momentum spectra in the current region of the Breit frame at HERA (ZEUS)

Scaled momentum spectra in the current region of the Breit frame at HERA (ZEUS)

Speaker: Beate Brzozowska (Warsaw University)

Slides dis.pdf

16:30 Measurements of K0s, Lambda and Lambda bar and Bose Einstein correlations between Kaons in DIS (ZEUS)

Measurements of K0s, Lambda and Lambda bar and Bose Einstein correlations between Kaons in DIS (ZEUS)

Speaker: Boris Levchenko (SINP MSU)

Slides dis07talk_bbl.pdf

16:50 Measurement of the pT-broadening of pions and kaons produced in deep-inelastic scattering from heavy nuclei

Speaker: Yves van Haarlem

Slides dis07_ptbroad_van_haarlem.pdf.pdf

17:10 New features of the Abramovski-Kancheli-Gribov unitarity cutting rules in QCD

New features of the Abramovski-Kancheli-Gribov unitarity cutting rules in QCD

Speaker: Kolya Nikolaev (Forschungszentrum Jülich (IKP))

Slides KolyaDIS2007.pdf

17:30 Structural relations between Harmonic Sums up to w=6 and representation of higher order splitting and coefficient functions

Structural relations between Harmonic Sums up to w=6 and representation of higher order splitting and coefficient functions

Speaker: Johannes Blümlein (Desy Zeuthen)

Slides HSUM.pdf HSUM.pdf

16:10 → 18:10 Structure Functions and Low-x: 8

16:10 The combined PDF+pT fit

Speaker: C.-P. Yuan (Michigan State University)

Slides pdfpt_cpyuan.pdf.pdf

16:30 LO/NLO partons for Monte Carlos

Speaker: Robert Thorne (University of College London)

Slides dis07mc.pdf

16:50 New Global fit to the F2 structure function

.

Speaker: Dominik Gabbert (DESY Zeuthen)

Slides f2fit.pdf

17:10 Progress in neural parton distributions

.

Speaker: Juan Rojo-Chacon (LPTHE)

Slides rojo_dis2007.pdf

17:30 Parameterization of PDF based on self-organizing maps

.

Speaker: Simonetta Liuti (University of Virginia)

Slides sl_SOM_dis07.pdf

17:50 The curvature of F2 as a probe of pQCD evolution in the small-x region

.

Speaker: Christian Pisano (Vrije Universiteit Amsterdam)

Slides pisano.pdf

18:15 → 18:45 Special Session

18:15 Airbus A380

18:15 → 19:00 Heavy Flavors: Charm Mass

19:30 → 23:00 Conference Dinner

Thursday 19 April

08:00 → 09:00 Breakfast

09:00 → 10:40 Diffraction and Vector Mesons: 9

09:00 DVCS at HERA II

DVCS at HERA II

Speaker: Laurent Schoeffel (CEA Saclay)

Slides laurent_schoeffel.pdf.pdf

09:20 Multi-particle decays of light mesons measured by PHENIX at RHIC

Multi-particle decays of light mesons measured by PHENIX at RHIC

Speaker: Sasha Milov (BNL)

Slides low_mass_milov_dis_07.pdf low_mass_milov_dis_07.ppt

09:40 Measurements of phi mesons from hadronic and leptonic decays at RHIC by PHENIX

Measurements of phi mesons from hadronic and leptonic decays at RHIC by PHENIX

Speaker: Shengli Huang (PHENIX Collaboration)

Slides DIS2007_Shengli_Phi.pdf DIS2007_Shengli_Phi.pdf

10:00 QCD factorizations in gamma* gamma* -> rho rho

QCD factorizations in gamma* gamma* -> rho rho

Speaker: Mathieu Segond (LPT Orsay)

Slides 04.Mathieu_Segond.pdf

10:20 Discussion

09:00 → 11:00 Electroweak Measurements (Including Top) and Beyond the Standard Model: 6

09:00 Search for contact interactions in ep collisions at ZEUS

Search for contact interactions in ep collisions at ZEUS

Speaker: Stefan Schlenstedt (DESY Zeuthen, ZEUS)

Slides Stefan-Schlenstedt-CI.pdf

09:20 Events with an isolated lepton and missing transverse momentum at ZEUS

Events with an isolated lepton and missing transverse momentum at ZEUS

Speaker: Katherine Korcsak-Gorzo (University of Oxford)

Slides kkg.DIS07.19Apr07.pdf NEW.kkg.DIS07.19Apr07.pdf.pdf

09:40 Events with an isolated lepton and missing transverse momentum at H1

Events with an isolated lepton and missing transverse momentum at H1

Speaker: Ytsen de Boer (ITEP, H1)

Slides dis.2007.ytsen.de.boer.pdf

10:00 Multi-lepton production in ep collisions at H1

Multi-lepton production in ep collisions at H1

Speaker: Gerhard Brandt (University of Heidelberg, H1)

Slides 2007_DIS2007_Brandt.pdf 2007_DIS2007_Brandt.pdf

10:20 Dilepton production in ep collisions at ZEUS

Dilepton production in ep collisions at ZEUS

Speaker: Ota Osamu (Tokyo Metropolitan University, ZEUS)

Slides osamu_multi-lepton_zeus_dis2007.pdf

09:00 → 10:40 Future of DIS: 3

09:00 Small-x and forward physics in pp/pA at RHIC

Speaker: Steven Heppelmann (Penn State)

Slides 01_Heppelmann.pdf 01_Heppelmann.ppt

09:20 Forward Physics at the LHC

Speaker: David d'Enterria (CERN)

Slides dis07_muenchen_apr07_fwdlhc_denterria.pdf

09:50 Small-x and nuclei in ep/eA at the EIC

Speaker: Bernd Surrow (MIT)

Slides DIS07_low-x_EIC_surrow.pdf

10:10 Small-x physics in ep/eA at the LHeC

Speaker: Paul Newman (University of Birmingham)

Slides LHeC_DIS07.pdf

09:00 → 10:35 Heavy Flavors: 7 - Beauty cross section

Convener: Benno List (University of Hamburg)

09:00 Review on b cross sections at HERA

.

Speaker: Achim Geiser (DESY)

Slides AGDIS07.ppt

09:35 F2b from the ZEUS HERA-II data

.

Speaker: Benjamin Kahle (DESY)

Slides f2b.pdf

09:55 B hadron lifetimes and rare decays (CDF/D0)

.

Speaker: Marjorie Corcoran (Rice University)

Slides corcoran_munich.pdf.pdf

10:15 J/Psi cross section and Psi'/Psi ratio (HERA-B)

.

Speaker: Martin zur Nedden (Humboldt Univ. Berlin)

Slides 2007_dis_nedden.pdf 2007_dis_nedden.ppt

09:00 → 10:40 Spin Physics: 8

09:00 Soft gluon resummation and a novel asymptotic formula for double-spin asymmetries in dilepton production at small transverse momentum

We study the double-spin asymmetries in transversly/longitudinally polarized Drell-Yan processes at transverse momentum Q_T of the produced lepton pair. We first consider the double transverse-spin asymmetry A_{TT}(Q_T) in the transversely polarized Drell-Yan process in detail, in particular, in the small Q_T region, where the bulk of dileptons are produced. The large logarithms due to the soft gluon emission at small Q_T are resummed in the Drell-Yan cross sections at the next-to leading logarithmic (NLL) accuracy, employing the impact parameter b-space formulation. The numerical calculation shows that the effects of the soft gluon resummation to the polarized and unpolarized cross sections largely cancel in A_{TT}(Q_T), but the significant corrections still remain. In particular, as a result of the resummaiton, the flat behavior of A_{TT}(Q_T) is generically observed in the small Q_T region, from Q_T =0 to the peak region of the cross-section Q_T-spectrum, indicating that the Q_T =0 limit of A_{TT}(Q_T) is theoretically a useful quantity. We evaluate the impact parameter b-integral in the resummed cross sections at Q_T=0 by the saddle-point method, and derive a novel asymptotic formula of A_{TT}(Q_T =0), which obeys a remarkably simple analytic form and is exact when the dilepton mass Q is large. We demonstrate the accuracy of our asymptotic formula even at the kinematics of RHIC, J-PARC, and GSI, comparing with the corresponding results of the numerical calculation. Because of the simple structure of our formula, it enables us to extract information on the transversity directly from the data of A_{TT}(Q_T) measured in polarized Drell-Yan processes in the small Q_T region. We also extend our framework to the double-spin asymmetry A_{LL}(Q_T) in the longitudinally polarized Drell-Yan process in the small Q_T region, and derive the corresponding asymptotic formula for A_{LL}(Q_T =0), and discuss its usefulness for extracting the information on the helicity distributions of quarks and gluons inside nucleon.

Speaker: Hiroyuki Kawamura (RIKEN)

Slides DIS2007.pdf

09:20 Factorization and gauge invariance of the twist-3 cross-section for single spin asymmetry

We present a consistent framework for the twist-3 calculation for the single transverse spin asymmetry (SSA). We prove that the consistent use of the Ward identity for color gauge invariance is crutial to obtain the factorization property and the gauge invariance of the twist-3 single-spin-dependent cross section. This proof had been missed in the previous literature. As an application, we present a complete twist-3 cross section formula for SSA for semi-inclusive deep inelastic scattering in terms of the complete set of the twist-3 quark-gluon distributions which include all kinds of pole (soft-gluon-pole, soft-fermion-pole and hard-pole) contributions. We will also make a comment on the connection between the twist-3 approach and the Sivers function approach to SSA. The detail is reported in our recent paper Nucl.Phys.B763:198-227,2007 [HEP-PH 0610314].

Speaker: Prof. Yuji Koike (Department of Physics, Niigata University)

09:40 Novel master formula for twist-3 soft-gluon-pole mechanism to single transverse-spin asymmetry

It is known that a dominant QCD mechanism for the single transverse-spin asymmetry in hard processes is induced by the twist-3 quark-gluon correlations inside a hadron, combined with the soft-gluonic poles to produce the interfering phase for the associated partonic hard scattering. We show that the coupling of the relevant soft gluon to partonic subprocess can be systematically disentangled, so that the corresponding interfering amplitude can be calculated entirely in terms of the partonic cross section for 2-to-2 Born subprocess which participates in the twist-2 cross section formula. We establish a new formula that represents the exact rules to derive the SSA due to soft-gluon poles from the knowledge of the twist-2 cross section formula. This master formula is applicable to a range of processes like Drell-Yan and direct-photon production, and pion production in semi-inclusive deep inelastic scattering and in pp collisions. The detail is reported in our recent paper HEP-PH 0612117.

Speaker: Prof. Kazuhiro Tanaka (Dept. of Physics, Juntendo University)

10:00 The role of gauge invariance in single-spin asymmetries

The Sivers effect is a possible source for many single spin asymmetries. The appearance of the Sivers distribution function is also a testinground for our understanding of universality. A well-known example of the peculiar universality property of this function is the relative sign difference of the Sivers function in SIDIS and Drell-Yan scattering. This opposite sign is a direct consequence of the initial or final state interactions that give rise to the future (SIDIS) and past (Drell-Yan) pointing Wilson lines in the Sivers distribution function. The Wilson lines are path-ordered exponentials with process-dependent integration paths in the case of transverse momentum dependent functions. When going beyond the basic electromagnetic scattering processes these Wilson lines can become quite complicated structures. In turn, this observation has consequences on the universality of the transverse momentum dependent Sivers functions, that are still today not fully understood. However, the complicated Wilson lines also have well-defined consequences for the transverse moment of the Sivers function. In particular, they lead to precise predictions for certain single-spin asymmetries of which experimental verification or falsification would test our understanding of the underlying principles. We will present two such observables, i.e. specific weighted azimuthal asymmetries in hadronic back-to-back jet or photon+jet production.

Speaker: Cedran Bomhof (Vrije Universiteit Amsterdam)

Slides DIS2007BOMHOF.pdf

10:20 Measurement of Sivers asymmetry for di-jets at STAR in polarized p+p collisions at 200GeV

Speaker: Jan Balewski (IUCF)

Slides Balewski_DIS07-ver2.pdf Balewski_DIS07-ver2.ppt

10:40 → 11:10 Coffee/Tea

11:10 → 12:55 Diffraction and Vector Mesons: 10

11:10 Status of the H1 Very Forward Proton Spectrometer

Status of the H1 Very Forward Proton Spectrometer

Speaker: Laurent Favart (Universite Libre de Bruxelles)

Slides DIS07-VFPS.pdf

11:25 Status of forward physics projects at ATLAS

The ATLAS experiment at the LHC is building several detector systems for forward physics studies and to determine the luminosity. The main forward systems consist of a Cerenkov detector called LUCID, a Zero Degree Calorimeter (ZDC) and Roman Pots which initially will house a scintillating fiber tracker system called ALFA. This presentation will describe the foreseen forward physics activities in ATLAS together with the status of the related detector systems. The detector performance obtained from beam tests both at DESY and at CERN will be presented and the final steps to completion will be outlined.

Speaker: Stefan Ask (CERN)

Slides S_Ask_DIS2007.pdf

11:45 Status of forward physics projects at CMS

Status of forward physics projects at CMS

Speaker: Kerstin Borras (DESY)

Slides dis07_cms_fwd.pdf dis07_cms_fwd.ppt

12:05 Status of FP420 R&D project

Status of FP420 R&D project

Speaker: Andy Pilkington (University of Manchester)

Slides PilkingtonFP420DIS07.pdf

12:20 High mass diffractive physics at the LHC

High mass diffractive physics at the LHC

Speaker: Christophe Royon (DAPNIA-SPP, CEA Saclay)

Slides dis2007_pots.pdf

11:10 → 12:50 Electroweak Measurements (Including Top) and Beyond the Standard Model: 7

11:10 A general search for new phenomena at HERA

A general search for new phenomena at HERA

Speaker: Emmanuel Sauvan (CPP Marseille, H1)

Slides general_search_sauvan.pdf.pdf

11:30 Quaero@H1: An interface to high-pT HERA event data

Distributions from high-pT HERA event data analyzed in a general search for new physics at H1 have been incorporated into Quaero, an algorithm designed to automate tests of specific hypotheses with high energy collider data. The use of Quaero@H1 to search for leptoquarks, R-parity violating supersymmetry, and excited quarks provides examples to develop intuition for the algorithm's performance.

Speaker: Sascha Caron (University of Freiburg)

Slides 07-Caron.pdf.pdf

11:50 Search for leptoquarks in ep collisions at H1

Search for leptoquarks in ep collisions at H1

Speaker: Ana Dubak (University of Montenegro/MPI Munich, H1)

Slides dis2007-lfv-dubak.pdf

12:10 Search for excited leptons in ep collisions at H1

Search for excited leptons in ep collisions at H1

Speaker: Nguyet Trinh (CPP Marseille, H1)

Slides Trinh_ExcitedLeptonDIS2007.pdf

12:30 Non-SUSY searches at Tevatron

Non-SUSY searches at Tevatron

Speaker: David Stuart (UC Santa Barbara, CDF)

Slides dis_stuart.pdf

11:10 → 12:50 Future of DIS: 4

11:10 Future plans at JLab: 12 GeV upgrade and ELIC

Speaker: Allison Lung (Jefferson Lab)

Slides DIS2007-12GeV-ELIC.pdf DIS2007-12GeV-ELIC.ppt

11:35 Future plans at BNL: RHIC-II and eRHIC

Speaker: Sam Aronson (BNL)

Slides FDIS_Aronson.pdf

12:00 Future plans at CERN: LHeC

Speaker: John Dainton (Cockcroft Institute and University of Liverpool)

Slides 07_Dainton.pdf 07_Dainton.ppt

11:10 → 12:40 Heavy Flavors: 8 - Heavy flavor prospects at future colliders

Convener: Stephanie Hansmann-Menzemer (University of Heidelberg)

11:10 B physics prospects at LHCb

.

Speaker: Emanuele Santovetti (INFN - Rome II)

Slides santovetti_dis2007.pdf santovetti_dis2007.ppt

11:40 Outlook for b and c Physics at the LHC (ATLAS + CMS)

.

Speaker: Attila Krasznahorkay (CERN)

Slides ATLAS_CMS_overview.pdf.pdf

12:10 Heavy flavour production at the ILC

.

Speaker: Tim Greenshaw (Univ. Liverpool)

Slides FlavourAtTheILC.pdf

11:10 → 12:50 Spin Physics: 9

11:10 Transverse momentum in semi-inclusive DIS

The cross section for polarized semi-inclusive deep inelastic scattering is reviewed, including in particular the dependence on the transverse momentum of the detected hadron. Out of the 18 structure functions appearing in the cross section, we will discuss the present knowledge of a few selected examples.

Speaker: Alessandro Bacchetta (DESY)

Slides

• bacchetta.pdf
• bacchetta.ppt
• bacchetta.ppt.pdf

11:30 Transversity signals in two-hadron production in COMPASS

An important missing piece in our understanding of the spin structure of the nucleon is the transversity distribution function Delta_Tq(x). It is only one of the three leading-twist quark distribution functions q(x), Delta q(x) and Delta_Tq(x) that so-far remains unmeasured. The function Delta_Tq(x) describes the distribution of transversely polarized quarks in a transversely polarized nucleon. It is difficult to measure Delta_Tq(x), since it is a chiral-odd function which can only be probed in combination with another chiral-odd function. One suggested probe to access transversity is the measurement of two-hadron production in semi-inclusive deep-inelastic scattering on a transversely polarized target. In this case, transversity is accessible via the chiral-odd two-hadron interference fragmentation function H_1^\sphericalangle(z,M_h^2). The COMPASS experiment has measured target single-spin asymmetries in semi-inclusive production of hadron pairs. The data presented have been taken scattering a 160 GeV muon beam off a transversely polarized deuterium target. The scattered hadrons have been identified as pions and kaons using the information of a ring imaging Cherenkov detector. The azimuthal asymmetries are presented as a function of the invariant mass of the hadron pairs and in dependence of the kinematic variables x_{Bj} and z.

Speaker: Christian Schill (Univ. Freiburg)

Slides schill-dis07.pdf

11:50 Evolution equations for dihadron fragmentation functions

We consider dihadron fragmentation functions, that describe the fragmentation of a parton in two (unpolarized) hadrons. Using Jet calculus techniques, we develop evolution equations when these functions are explicitly depending upon the invariant mass of the produced hadron pair, the socalled extended dihadron fragmentation functions. We connect our results to the integrated dihadron fragmentation functions and we establish a formal correspondence with the (extended) fracture functions in the space-like domain. Our results can be used in the analysis of (spin) asymmetries in the azimuthal distribution of final pion pairs, particularly for semi-inclusive deep-inelastic scattering on transversely polarized targets, where extended dihadron fragmentation functions represent a convenient analyzing power to extract the quark transversity distribution.

Speaker: Marco Radici (INFN - Sezione Pavia)

Slides radici.pdf.pdf

12:10 Beyond Collins and Sivers: further measurements of the target transverse spin-dependent azimuthal asymmetries in semi-inclusive DIS from COMPASS

In semi-inclusive DIS of polarized leptons on a transversely polarized target eight azimuthal modulations appear in the cross-section. Within QCD parton model four azimuthal asymmetries can be interpreted at leading order, two of them being the already measured Collins and Sivers asymmetries. The other two leading twist asymmetries, related to different transverse momentum dependent quark distribution functions, and also additional four asymmetries which can be interpreted as twist-three contributions have been measured from the COMPASS data, using a 160 GeV/c longitudinally polarized muon beam and a transversely polarized ^6LiD target. The preliminary results from the 2002-2004 data are presented here for the first time.

Speaker: Aram Kotzinian (INFN Torino)

Slides kotzinian_DIS07.pdf kotzinian_DIS07.pdf

12:30 Studying proton spin structure with the PHENIX upgrade program

The PHENIX upgrade program adds a set of silicon pixel detectors (the VTX and FVTX), forward calorimetry (the NCC), and Level-1 trigger detectors (the Muon Trigger Upgrade) to the baseline detector. These upgrades will enhance the ability of PHENIX to pursue a rich program of spin physics in polarized proton collisions, in particular at sqrt(s) = 500 GeV. The VTX and FVTX detectors will provide a larger x range over which the gluon polarization (Delat-G/G) can be determined and allow for a direct measurement of spin asymmetry in beauty production. The Nosecone Calorimeter will provide high-segmentation electromagnetic calorimetry at high rapidity to open a wide variety of channels through measurements of photons and electrons. It will also provide improved constraints on parton kinematics. The Muon Trigger Upgrade will allow the experiment to select high momentum muons from the decay of W bosons and reject both beam-associated and low-momentum collision background, enabling the study of quark and antiquark polarization in the proton trough the use of parity violating (single longitudinal spin) asymmetries. The combination of all three of these upgrades enable a complementary, comprehensive physics program. In many cases these upgrades will work together to improve the quality of physics measurements and reduce backgrounds. I will describe the various components of the upgrades, their implementation, and the expected sensitivity for a variety of spin-related measurements.

Speaker: John Lajoie (Iowa State University)

Slides Lajoie_DIS07.pdf

12:50 → 14:00 Lunch

14:00 → 18:00 Excursions

Friday 20 April

08:00 → 09:00 Breakfast

09:00 → 10:30 Plenary Session

09:00 Structure Functions and Low-x: Session Summary

Speaker: Sven-Olaf Moch (DESY-Zeuthen)

Slides 01-moch.pdf

09:45 Diffraction and Vector Mesons: Session Summary

Speakers: Leszek Motyka, Uta Klein

Slides 02-klein.pdf 02-motyka.ppt

10:30 → 11:00 Coffee/Tea

11:00 → 12:30 Plenary Session

11:00 Electroweak Measurements and Beyond the Standard Model: Session Summary

Speakers: Michael Spira, Thomas Nunnemann

Slides 03_nunnemann.pdf 03_spira.pdf

11:45 Future Opportunities

Speaker: Joel Feltesse

Slides 04-Feltesse.pdf 04-Feltesse.ppt

12:30 → 14:00 Lunch

14:00 → 15:30 Plenary Session

14:00 Hadronic Final States and QCD: Session Summary

Speakers: Alexander Savin (University of Wisconsin,Madison), Giulia Zanderighi (CERN)

Slides

• 05_savin.pdf
• 05_savin.ppt
• 05_Zanderighi.pdf

14:45 Heavy Flavors: Session Summary

Speakers: Benno List (Hamburg), Michael Klasen (Grenoble)

Slides

• 06_klasen.pdf
• 06_klasen.ppt
• 06_List.pdf

15:30 → 16:00 Coffee/Tea

16:00 → 17:45 Plenary Session

16:00 Spin Physics: Session Summary

Speakers: Daniel Boer (Amsterdam), Delia Hash (Frascati)

Slides

• 07_boer.pdf
• 07_Hasch.pdf
• 07_Hasch.ppt

16:45 Open Questions

Speaker: Graham Ross

Slides openquestions.pdf

17:30 Closing DIS 2007

Speaker: Prof. Allen Caldwell (MPI for Physics, Munich)

Slides 09_AC_ending.pdf