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Ilse Kratschmer (Austrian Academy of Sciences (AT))23/07/2015, 09:00QCD and Hadronic PhysicstalkThis talk presents the CMS quarkonium production results in pp collisions, placing emphasis on the most recent measurements, which include the S-wave Psi(nS) and Y(nS) cross sections up to transverse momenta exceeding 100 GeV with the Run-1 dataset, and reports on the prospects for B physics measurements with high statistics data at CMS, and presents preliminary results obtained with 13 TeV data.Go to contribution page
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Stefanos Leontsinis (National Technical Univ. of Athens (GR))23/07/2015, 09:15QCD and Hadronic PhysicstalkWe present a large number of detailed measurements of the production of various open and hidden charm (D meson, J/psi, psi(2s), chi_c) states at the ATLAS experiment at centre- of-mass energies of 2.76 TeV, 7 TeV, and 8 TeV. The total charm production cross-section at the LHC is also determined. These measurements extend in reach and precision beyond those currently available, and we compare...Go to contribution page
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Barbara Trzeciak (Czech Technical University in Prague)23/07/2015, 09:30QCD and Hadronic PhysicstalkDespite extensive studies, the J/$\psi$ production mechanism in hadron collisions is not yet exactly known. For many years, mostly J/$\psi$ differential cross-section measurements have been used to test different J/$\psi$ production models. While many models can reasonably well describe the experimental data on the J/$\psi$ cross-section in $p+p$ collisions, they have different predictions...Go to contribution page
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Alexei Garmash (Princeton)23/07/2015, 09:45QCD and Hadronic PhysicstalkRecent observations of charged charmonium-like states have opened an interesting landscape in the field of hadron spectroscopy. Continuing with its tradition, Belle recently observed a new charged charmonium-like state Zc(4200) and obtained an evidence for Zc(4430) โ J/ฯฯ+ in B โ J/ฯฯK decays. Belle also found the first evidence for a new charged state Zc(4020)+ in their updated study of ISR...Go to contribution page
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Yutie Liang (Giessen University)23/07/2015, 10:00QCD and Hadronic PhysicstalkThe BESIII Experiment at the Beijing Electron Positron Collider (BEPCII) has accumulated the world's largest samples of $e^+e^-$ collisions in the tau-charm region. From the collected samples, which include $e^+e^-$ annihilations at J/psi, psi(2S), psi(3770) peaks and in the region from 4 GeV to 4.6 GeV, BESIII has produced many new results in the spectroscopy, transitions, and decays of...Go to contribution page
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Sheldon Stone (Syracuse University (US))23/07/2015, 10:15QCD and Hadronic PhysicstalkObservations of exotic structures in the $J/\psi p$ channel, that we refer to as pentaquark-charmonium states, in $\Lambda_b^0 \to J/\psi p K^-$ decays are presented. The data sample corresponds to an integrated luminosity of $3~fb^{-1}$ acquired with the LHCb detector from 7 and 8~TeV $pp$ collisions. An amplitude analysis is performed on the three-body final state that reproduces all the...Go to contribution page
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James William Walder (Lancaster University (GB))23/07/2015, 10:30QCD and Hadronic PhysicstalkHadronic spectroscopy has experienced a renaissance in the last decade thanks to experiments at B-factories and Tevatron and recently at the LHC. A wide zoology of quarkonium-like states still needs to be understood within a possibly consistent framework that the LHC experiments are now contributing to enrich. The latest results on the production and decay properties of exotic mesons in the...Go to contribution page
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23/07/2015, 10:45QCD and Hadronic PhysicstalkWe present a measurement of the production cross section of the D+ mesons in proton-antiproton collisions at 1.96 TeV center-of-mass energy, using the full data set collected by the CDF experiment at the Tevatron collider during Run II. The measurement is performed in a yet unexplored low transverse momentum range, down to 1.5 GeV/c, using events collected with the "zero bias" and "minimum...Go to contribution page
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Darren Price (University of Manchester (GB))23/07/2015, 11:30QCD and Hadronic PhysicstalkWe present recent results on heavy flavor jet production in association with weak vector bosons using proton-antiproton collision data collected with the D0 detector at center of mass energy of 1.96 TeV. Studies of these processes provide tests of perturbative QCD predictions and non-perturbative effects. They are also important backgrounds to many precision SM measurements as well as searches...Go to contribution page
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Ivan Polyakov (ITEP Institute for Theoretical and Experimental Physics (RU))23/07/2015, 11:45QCD and Hadronic PhysicstalkIts forward acceptance puts the LHCb in a unique position at the LHC to measure QCD phenomena at large rapidities and low transverse momenta, where theoretical models often fail to describe the data accurately. We present new studies of the production of the ฯ meson of the ฮb baryon.Go to contribution page
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Grazia Luparello (Universita e INFN, Trieste (IT))23/07/2015, 12:00QCD and Hadronic PhysicstalkHeavy quarks, i.e. charm and beauty, are produced in hard parton scatterings in the initial stages of hadronic collisions. The study of their production in pp collisions at LHC energies provides, therefore, a test of perturbative QCD calculations at the highest collision energies available. In addition to the heavy-flavour production cross sections, more differential measurements provide...Go to contribution page
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Iain Bertram (Lancaster University)23/07/2015, 12:15QCD and Hadronic PhysicstalkWe present a first study of the inclusive production of the X(4140) state in hadronic collisions. We report the X(4140) production rate and a new measurement of its mass and width. The results of searches for the Zb(10610) and the Zb(10650) using the decay Zb โ ฮฅ(nS)ฯยฑ where Upsilon(nS) โ ฮผฮผ are also presented. Sensitivity to the production of Zb is demonstrated. We present a measurement of...Go to contribution page
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Paolo Gandini (University of Oxford (GB))23/07/2015, 12:30QCD and Hadronic PhysicstalkIts forward acceptance puts the LHCb in a unique position at the LHC to measure QCD phenomena at large rapidities and low transverse momenta, where theoretical models often fail to describe the data accurately. We present new exclusive production studies of ฯ mesons. A first look at the new Run II data and the performance of the new HERSCHEL forward counters may be presented.Go to contribution page
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Alexey Guskov (Joint Inst. for Nuclear Research (RU))23/07/2015, 12:45QCD and Hadronic PhysicstalkThe electric (${\alpha}_{\pi}$) and the magnetic (${\beta}_{\pi}$) polarisabilities are fundamental properties of the pion characterising the rigidity of its internal structure as a complex QCD system. They have been precisely measured at the COMPASS experiment at CERN with a ${\pi}^{-}$ beam of 190~GeV/c assuming ${\alpha}_{\pi}+{\beta}_{\pi}=0$. Muons of the same momentum were used for...Go to contribution page
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Jesper Roy Christiansen (Lund University (SE))23/07/2015, 14:30QCD and Hadronic PhysicstalkRecent progress on colour reconnection within the PYTHIA framework is presented. A new model is introduced, based on the SU(3) structure of QCD and a minimization of the potential string energy. The inclusion of the epsilon structure of SU(3) gives a new baryon production mechanism and makes it possible simultaneously to describe hyperon production at both ee and pp colliders....Go to contribution page
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Nadine Fischer (KIT - Karlsruhe Institute of Technology (DE)), Peter Skands (Monash University (AU)), Simon Plaetzer (ITP, Universitaet Karlsruhe), Stefan Gieseke, Stefan Kluth (Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut) (D)23/07/2015, 14:45QCD and Hadronic PhysicstalkA study of QCD coherence is presented based on a sample of about 397.000 e$^+$e$^-$ hadronic annihilation events collected at $\sqrt{s}=91$ GeV with the OPAL detector at LEP. The study is based on four recently proposed observables that are sensitive to coherence effects in the perturbative regime. The measurement of these observables is presented, along with a comparison with the...Go to contribution page
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Thorsten Kuhl (Deutsches Elektronen-Synchrotron Campus Zeuthen (DE))23/07/2015, 15:00QCD and Hadronic PhysicstalkThe ATLAS collaboration has carried out several measurements of particle production properties and correlations at different pp collisions centre-of-mass energies. The production properties of mesons and baryons at sqrt(s)=7 TeV are presented and compared to predictions. The effects of space-time geometry in the hadronization phase has been studied in the context of...Go to contribution page
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Gabor Veres (CERN)23/07/2015, 15:15The CMS Collaboration has a comprehensive program of small-x QCD and forward physics measurements, which is supported by an excellent experimental coverage into the very forward phase space. Some of the highlights in terms of testing QCD at low-pt and at high pseudorapidities with jets and charged particles are summarized. Also extremely rare processes, as the measurement of exclusive...Go to contribution page
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Anthony Morley (University of Sydney (AU))23/07/2015, 15:30QCD and Hadronic PhysicstalkMeasurements are presented from proton-proton collisions at different centre-of-mass energies in the range of 0.9 to 13 TeV recorded with the ATLAS detector at the LHC. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between the mean transverse momentum and charged-particle multiplicity are measured. The results are corrected...Go to contribution page
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Hans Van Haevermaet (University of Antwerp (BE))23/07/2015, 15:45Several measurements of jet final states are presented performed at different center-of-mass energies and down to very low pt. The simultaneous observation of several jets in the same event is exploited to study for example the angular correlations of Mueller Navelet jet topologies in order to search for the signature of BFKL parton dynamics. But multi-jet measurements are also used to...Go to contribution page
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Antoni Szczurek (Institute of Nuclear Physics), Rafal Maciula (Institute of Nuclear Physics PAN)23/07/2015, 16:30QCD and Hadronic PhysicstalkWe present first results for the $2 \to 4$ single-parton scattering $g g \to c \bar c c \bar c$ subprocess for the first time fully within the $k_t$-factorization approach. In this calculation we have used the Kimber-Martin-Ryskin unintegrated gluon distribution which effectively includes some class of higher-order gluon emissions, and an off-shell matrix element squared calculated using...Go to contribution page
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Marko Bracko (Jozef Stefan Institute)23/07/2015, 16:45QCD and Hadronic PhysicstalkThe $e^+ e^โ$ annihilation process provides an access to the fragmentation functions due to its clean environment. Using the high-statistics dataset accumulated by the Belle detector at the KEKB asymmetric-energy $e^+ e^โ$ collider, we report the first measurements of the double differential cross section of identified di-hadrons (pions and kaons) with respect to the two hadron's fractional...Go to contribution page
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Per Grafstrom (Universita e INFN, Bologna (IT))23/07/2015, 17:00QCD and Hadronic PhysicstalkThe total pp cross section is a fundamental parameter of the strong interaction which cannot be calculated in QCD but still can be measured using the optical theorem, which states that the total cross section can be obtained from the extrapolation to t=0 of the differential elastic cross section measured at small four-momentum transfer t. The ATLAS Collaboration has collected 80 mub-1 of...Go to contribution page
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Hans Van Haevermaet (University of Antwerp (BE))23/07/2015, 17:15QCD and Hadronic PhysicsExperiments in the upcoming high-luminosity runs at the LHC face the challenges of very large pile-up. Primary techniques to deal with this are based on vertexing by trackers. Outside the detector tracking acceptances, however, lie regions of much interest for a great many aspects of the LHC physics program. Treatments of pile-up in these regions rely more strongly on Monte Carlo...Go to contribution page
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Don Lincoln (Fermilab)23/07/2015, 17:30We use a sample of diphoton + dijet events, as well as a sample of simultaneous production of two heavy quarkonia (two J/psi or J/psi and Upsilon) collected by the D0 detector at the Fermilab Tevatron collider, to study properties of events with double parton scattering (DPS) in single pยฏp collisions at sqrt(s) = 1.96 TeV. We measure the cross sections and extract the effective cross...Go to contribution page
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Ankita Mehta (Panjab University (IN))23/07/2015, 17:45QCD and Hadronic PhysicstalkDouble parton scattering is measured in different channels using the CMS experiment at the CERN LHC. Data from pp collisions collected at 7 and 8 TeV center-of-mass energy are used. Several final states are investigated to identify and measure the signature of double parton scattering in inelastic events. Parameters are extracted from the data that are suited in an optimal way to distinguish...Go to contribution page
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Oleksii Turkot (DESY)24/07/2015, 09:00A combination is presented of all inclusive deep inelastic cross sections measured by the H1 and ZEUS collaborations in neutral and charged current unpolarised ep scattering at HERA. The data correspond to a luminosity of about 1 fb$^{-1}$ and span six orders of magnitude in negative four-momentum-transfer squared, Qยฒ, and Bjorken x. They include data taken at proton beam energies of 920,...Go to contribution page
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Jan Hladky (Acad. of Sciences of the Czech Rep. (CZ))24/07/2015, 09:15H1 and ZEUS have published single-differential cross sections for inclusive $D^{\star}$ meson production in deep-inelastic ep scattering at HERA from their respective final data sets. These cross sections are combined in the common visible phase space region of photon virtuality $Q^2> $5 GeVยฒ, electron inelasticity $0.02 < y< 0.7$ and the $D^{\star}$ meson's transverse momentum...Go to contribution page
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Panos Kokkas (University of Ioannina (GR))24/07/2015, 09:30Recent results on PDF constraints from CMS are presented.Go to contribution page
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Kristin Lohwasser (Deutsches Elektronen-Synchrotron Campus Zeuthen (DE))24/07/2015, 09:45Improved determination of the strange sea distribution in the nucleon is presented. Recent charm production data in neutrino-nucleon deep-inelastic scattering by the NOMAD and CHORUS experiments and from charged current inclusive deep-inelastic scattering at HERA are used. The results are consistent with the data from the ATLAS and the CMS experiments on the associated production of...Go to contribution page
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Eva-Maria Kabuss (Johannes Gutenberg-Universitat)24/07/2015, 10:00The COMPASS experiment at CERN performs a rich program in inclusive (DIS) and semi-inclusive (SIDIS) deep inelastic scattering of longitudinally polarised muons off longitudinally polarised nucleons. The main topic is the investigation of the spin structure of the nucleon in terms of quark and gluon polarisations. For the extraction of the contribution of the different quarks flavours...Go to contribution page
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Katerina Lipka (Deutsches Elektronen-Synchrotron (DE))24/07/2015, 10:15The impact of recent measurements of heavy-flavour production in deep inelastic ep scattering and in pp collisions on parton distribution functions is studied in a QCD analysis in the fixed-flavour number scheme at next-to-leading order. Differential cross sections of charm- and beauty-hadron production measured by LHCb are used together with inclusive and heavy-flavour production cross...Go to contribution page
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Achim Geiser (Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE))24/07/2015, 10:30The combined HERA data on charm production in deep inelastic scattering have recently been used to determine the charm quark running mass $m_c(m_c)$ in the $\overline{MS}$ renormalisation scheme. The same data are used differentially as a function of the photon virtuality Qยฒ to evaluate the charm quark running mass at different scales to one-loop order. The scale dependence of the mass is...Go to contribution page
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Johannes Bluemlein (DESY)24/07/2015, 10:45A survey is presented on the calculation of the 3-loop QCD corrections to the heavy flavor Wilson coefficients in deep-inelastic scattering in the region of large momentum transfer $Q^2 \gg m^2$ and on the 3-loop matching coefficients in the variable flavor number scheme. Results are presented for the flavor non-singlet and pure singlet cases and for contributions due to Feynman diagrams...Go to contribution page
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Robert Samuel Thorne (University College London (UK))24/07/2015, 11:30We present the MMHT2014 PDFs, an update of the previous major release in the same framework, i.e. MSTW2008. We discuss the changes in both the central values and uncertainties in the PDFs due to changes in theoretical procedures and the impact of new, largely LHC data-sets. We note, however, that changes in predictions are rather small. We discuss the correlation between the PDFs and the...Go to contribution page
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Voica Ana Maria Radescu (Ruprecht-Karls-Universitaet Heidelberg (DE))24/07/2015, 11:45The uncertainties of protons parton distribution functions (PDFs) play a dominant role for the precision tests of the Standard Model (SM) and they also impact substantially the theory predictions of Beyond SM high mass production. We present the HERAFitter project which provides a unique open-source software framework for the determination of the proton's PDFs and for the interpretation of...Go to contribution page
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Voica Ana Maria Radescu (Ruprecht-Karls-Universitaet Heidelberg (DE))24/07/2015, 12:00The new combined inclusive HERA cross sections were input to QCD analyses at NNLO, NLO and LO providing a new set of parton distribution functions, HERAPDF2.0. Besides the small experimental uncertainties, model and parameterisation uncertainties were also considered. The consistency of data and the QCD fit was tested for variants of the fit such as the treatment of heavy flavour...Go to contribution page
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Ali Khorramian (IPM and Semnan University)24/07/2015, 12:15We present a comparative analysis of the non-perturbative intrinsic charm quark contribution in the proton, using the inclusive production of $\gamma +c $-jet in $ pp $ and $ p\bar{p} $ collisions and for the kinematic regions that are sensitive to this contribution. We discuss the $ Q^2 $ evolution of intrinsic quark distributions and present a code that provide these distributions as...Go to contribution page
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Katarzyna Wichmann (Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE))24/07/2015, 12:30An extendend QCD analysis of the new combined inclusive HERA was performed at NLO, also including HERA data on jet and charm production. This enables the simultaneous measurement of parton distribution functions and the strong coupling using data from HERA alone. The strong coupling is measured to be $\alpha_s(M_Z)$= 0.1182 ยฑ0.0008(exp) ยฑ0.0005(model/param.) ยฑ0.0012(hadronisation)...Go to contribution page
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Juan Rojo Chacon (University of Oxford (GB))24/07/2015, 12:45I present NNPDF3.0, the first set of parton distribution functions (PDFs) determined with a methodology validated by a closure test. NNPDF3.0 uses a global dataset including HERA-II deep-inelastic inclusive cross-sections, the combined HERA charm data, jet production from ATLAS and CMS, vector boson rapidity and transverse momentum distributions from ATLAS, CMS and LHCb, $W$+$c$ data from...Go to contribution page
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Alexander Karlberg (University of Oxford (GB))24/07/2015, 14:30QCD and Hadronic PhysicstalkI will present fully differential NNLO corrections to vector-boson fusion (VBF) Higgs production at hadron colliders, in the limit in which there is no cross-talk between the hadronic systems associated with the two protons.The result is obtained by combining an inclusive NNLO calculation in the structure-function approach and a suitably factorised NLO VBF Higgs plus 3-jet...Go to contribution page
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Ilya Komarov (Ecole Polytechnique Federale de Lausanne (CH))24/07/2015, 14:45QCD and Hadronic PhysicstalkThe very first Run II LHC data allows LHCb to measure the cross-sections for quarkonia, beauty and charm productions. Results should be available quickly thanks to the new "Turbo" stream procedure allowing the analysis of particle candidates selected at trigger level without the need of offline reconstruction. First results are presented, conditional on LHC machine operation.Go to contribution page
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Manfred Kraus (RWTH Aachen)24/07/2015, 15:00QCD and Hadronic PhysicstalkWe give a short review of the shower concept, first introduced by Nagy and Soper, that includes full quantum correlations in the shower evolution. We also state the current status of implementation of the publicly available shower program Deductor. However, the main focus of the talk will be the matching of the shower at next-to-leading order within the MC@NLO formalism. Matching is necessary...Go to contribution page
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Zoltan Laszlo Trocsanyi (University of Debrecen (HU))24/07/2015, 15:15QCD and Hadronic PhysicstalkWe compute the fully differential decay rate of the standard model Higgs boson to a b-quark pair at NNLO accuracy. We use a general subtraction scheme developed for computing QCD jet cross sections in perturbation theory. The double real and real-virtual contributions to the second order radiative corrections, regularized by subtractions, are finite in four space-time dimensions and their...Go to contribution page
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Sebastian Buchta (IFIC Valencia)24/07/2015, 15:30QCD and Hadronic PhysicstalkThe Loop-Tree Duality (LTD) is a novel perturbative method in QFT that establishes a relation between loopโlevel and treeโlevel amplitudes, which gives rise to the idea of treating them simultaneously in a common Monte Carlo. Initially introduced for oneโloop scalar integrals, the applicability of the LTD has been expanded to higher order loops and Feynman graphs beyond simple poles. For the...Go to contribution page
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German Sborlini (IFIC-Valencia)24/07/2015, 15:45QCD and Hadronic PhysicstalkLoop-tree (LT) duality allows to express virtual contributions in terms of phase-space integrals, thus leading to a direct comparison with real radiation terms. In this talk, we review the basis of the method and describe its application to regularize Feynman integrals. Performing an integrand-level combination of real and virtual terms, we show that it is possible to recover physical results...Go to contribution page
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Martin Bessner (Deutsches Elektronen-Synchrotron Hamburg and Zeuthen (DE))24/07/2015, 16:30QCD and Hadronic PhysicstalkIsolated prompt photons provide a direct probe of short-distance physics, complementary to that provided by measurements of jets or vector-bosons and are sensitive to the gluon density of the proton. The inclusive prompt photon cross sections have been measured by the ATLAS collaboration at 7 and 8 TeV pp collision centre-of-mass energies, over a wide range of transverse momenta. The diphoton...Go to contribution page
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Harald Ita24/07/2015, 16:45QCD and Hadronic PhysicstalkThe study of vector-boson pair production in association with jets is one of the key signatures for the analysis of the electroweak symmetry breaking mechanism. While the vector bosons are the clear signs of electroweak dynamics, the associated jets are important tags to suppress backgrounds and probe the kinematic dependence of the interactions. At high jet multiplicity the di-vector...Go to contribution page
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Markus Zinser (Johannes-Gutenberg-Universitaet Mainz (DE))24/07/2015, 17:00QCD and Hadronic PhysicstalkThe inclusive production of W and Z bosons as well the off-shell Z/gamma* production are standard candles at hadron colliders. The measurement of their production cross-sections can be compared to theory calculations at NNLO QCD and have an impact on our knowledge of the parton densities of the proton. Run-1 studies carried out by the ATLAS Collaboration are reviewed and first LHC Run-2...Go to contribution page
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Debarati Roy (Saha), Debarati Roy (Saha Institute of Nuclear Physics (IN))24/07/2015, 17:15QCD and Hadronic PhysicstalkRecent results on jets measurements as well as jet properties and jet variables are presented.Go to contribution page
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Pavel Starovoitov (Ruprecht-Karls-Universitaet Heidelberg (DE))24/07/2015, 17:30QCD and Hadronic PhysicstalkSeveral aspects of jet production in pp collisions have been measured by the ATLAS collaboration. The momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the electrical charge of the parton initiating the jet. The distribution of the so-called jet charge has been measured in dijet events using pp collision data at 8 TeV with the ATLAS detector. The...Go to contribution page
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Marco Peruzzi (CERN)24/07/2015, 17:45QCD and Hadronic PhysicstalkThe production of vector bosons (V = W, Z or ฮณ) in association with jets is a stringent test of perturbative QCD and is a background process in searches for new physics. Total and differential cross-section measurements of vector bosons produced in association with jets and heavy flavour quarks in proton-proton collisions at the LHC are presented. The measurements are compared to next-to...Go to contribution page
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