Conveners
WG5: Heavy Flavours: Open heavy flavor production in ep and pp collisions // Quarkonia from ep and pp collisions
- Sebastian Naumann-Emme (Deutsches Elektronen-Synchrotron (DE))
- Michel Sauter
- Antoni Szczurek (Institute of Nuclear Physics)
WG5: Heavy Flavours: Heavy flavors at B factories // B meson decays in pp collisions
- Sebastian Naumann-Emme (Deutsches Elektronen-Synchrotron (DE))
- Michel Sauter
- Antoni Szczurek (Institute of Nuclear Physics)
WG5: Heavy Flavours: Top-quark physics // Heavy flavour from heavy ions, part #1
- Antoni Szczurek (Institute of Nuclear Physics)
- Michel Sauter
- Sebastian Naumann-Emme (Deutsches Elektronen-Synchrotron (DE))
WG5: Heavy Flavours: Heavy flavour from heavy ions, part #2
- There are no conveners in this block
Karin Daum
(University of Wuppertal/DESY)
23/04/2013, 08:30
Heavy Flavours
Talk in Parallel Session at DIS2013
The cross section for ep -> e b\bar{b} X in photoproduction is measured with the H1 detector at the ep-collider HERA. The decay channel b\bar{b} -> ee X' is selected by identifying the semi-electronic decays of the b-quarks. The total production cross section is measured in the kinematic range given by the photon virtuality Q^2 <= 1 GeV^2, the inelasticity 0.05 <= y <= 0.65 and the...
Rafal Maciula
(Institute of Nuclear Physics PAN)
23/04/2013, 08:50
Heavy Flavours
Talk in Parallel Session at DIS2013
Part 1:
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We discuss production of charmed mesons in proton-proton collisions at the LHC. The cross section for inclusive production of $c \bar c$ pairs is calculated in the framework of the $k_{\perp}$-factorization approach. Taking wide range of $x$ values necessary for the calculation we use and test several unintegrated gluon distributions from the literature. Some of them include...
Alexandr Kozlinskiy
(NIKHEF (NL))
23/04/2013, 09:10
Heavy Flavours
Talk in Parallel Session at DIS2013
The LHCb experiment has accumulated more than 3 fb-1 of data in proton-proton collisions data at different centre of mass energies, collecting a sample rich in charm and beauty hadrons.
Studies of the production of these states provide a wealth of new measurements as well as probes of theory predictions. We will present studies of charm and beauty production including measurements
of the...
Elvira Rossi
(Universita e INFN, Roma I (IT))
23/04/2013, 09:30
Heavy Flavours
Talk in Parallel Session at DIS2013
A new measurement of production cross of B+ is presented.
The double differential cross section is measured over the range |y| < 2.25 and 9 < pT <120 GeV, much wider than in previous measurements. Comparisons with next-to-leading order theoretical predictions (POWHEG+PYTHIA, MC@NLO+HERWIG and FONLL) are discussed.
Mario Galanti
(Universita e INFN (IT))
23/04/2013, 09:50
Heavy Flavours
Talk in Parallel Session at DIS2013
The large production cross-sections at LHC energies, combined with an adapted trigger strategy has enabled CMS to collect large data samples to perform detailed studies of Beauty hadron properties. In this talk we will report from our latest results, including Lambda_b production cross-section and lifetime measurements, bbbar cross-section differential in the opening angles deltaPhi and deltaR...
alessandro bertolin
(INFN - Sez. di Padova)
23/04/2013, 11:00
Heavy Flavours
Talk in Parallel Session at DIS2013
The double differential inelastic J/psi photoproduction cross section
as function of the squared transverse momentum of the J/psi in bins of the
inelasticity z has been measured in ep collisions with the ZEUS detector
at HERA.
An integrated luminosity of 468 pb-1 was used corresponding
to the full data sample collected by the ZEUS experiment.
The events were required to have 0.1 <...
Darren Price
(Indiana University (US))
23/04/2013, 11:20
Heavy Flavours
Talk in Parallel Session at DIS2013
The programme of measurement on quarkonia production performed by ATLAS in discussed. Particular emphasis is placed on the recent study of Y(1S), Y(2S) and Y(3S).The collected data extends to transverse momentum up to 70 GeV, much higher than in previous studies. The results are compared to theoretical models of Y production, which do not provide an accurate description of the data over the...
Joao Seixas
(Instituto Superior Tecnico (PT))
23/04/2013, 11:40
Heavy Flavours
Talk in Parallel Session at DIS2013
In the present talk we will present results from a large data sample collected at 7 TeV, from which CMS could extensively study the polarization of the 3 Upsilon states, as a function of pT in two rapidity windows, conducting a complete analysis, including the polar and azimuthal anisotropy angles, and in 3 different polarization frames.
Thanks to the large data sample, CMS could also...
Conor Fitzpatrick
(CERN)
23/04/2013, 12:00
Heavy Flavours
Talk in Parallel Session at DIS2013
The latest years have seen a resurrection of interest in searches for exotic states motivated by tantalising observations by Belle and CDF. Using the data collected at pp collisions at 7 and 8 TeV by the LHCb experiment we present limits on the X(4140) and studies of the X(3872) quantum numbers. Future prospects for other exotic states will be discussed.
Elif Asli Yetkin
(University of Iowa (US))
23/04/2013, 12:20
Heavy Flavours
Talk in Parallel Session at DIS2013
In this talk we will report from the two structures found in the J/psi phi decay channel, accessed through the exclusive B+ --> J/psi phi K+ decay. One of the structures confirms a previous observation by the CDF experiment, while the second structure has been observed by CMS for the first time. These contribute to the "systematic" studies of new structures in the search for new exotic...
Dr
David Muller
(SLAC)
23/04/2013, 14:00
Heavy Flavours
Talk in Parallel Session at DIS2013
We present the measurement of the mass of the D0 meson,
the D*(2010)+ natural line width, and the mass
difference between the D*(2010)+ and the
D0 mesons using pure samples of D*(2010)+ --> D0 pi+ decays.
The measurements are based on a data sample corresponding to
an integrated luminosity of about 477 fb-1, collected with
the BaBar detector.
Large improvements with respect to the...
Denis Bernard
(Laboratoire Leprince-Ringuet)
23/04/2013, 14:20
Heavy Flavours
Talk in Parallel Session at DIS2013
The B factories provide a unique playground for studying the properties of conventional and exotic charmonium states. We present recent results in initial state radiation and two-photon fusion, obtained using the full data set collected by the BaBar experiment.
Dr
Sevda Esen
(University of Cincinnati)
23/04/2013, 14:40
Heavy Flavours
Talk in Parallel Session at DIS2013
The Belle experiment has recorded 121 fb-1 of data at the Y(5S)
resonance, making this the world's largest data sample at this energy.
As the Y(5S) decays to Bs(*)Bs(*) pairs, this large sample provides
a unique opportunity for detailed studies of Bs decays at an e+e-
machine. Here we report a recent measurement of Bs->Ds(*)Ds(*)
decays and a new measurment of Bs->Ds(*)h decays.
Luis Alejandro Perez Perez
(INFN Sezione di Pisa),
Luis Alejandro Perez Perez
(Sezione di Pisa (IT))
23/04/2013, 15:00
Heavy Flavours
Talk in Parallel Session at DIS2013
Although CP violation in the B-meson system has been well established
by the B factories, there has been no direct observation of time-reversal
violation in this system. Using 468 million B-Bbar pairs collected by the
BABAR detector at SLAC, we measure T-violating parameters in the time
evolution of neutral-B mesons by comparing the probabilities of B0 or
anti-B0 transforming into...
Ruben Sandapen
(Universitรฉ de Moncton)
23/04/2013, 15:25
Heavy Flavours
Talk in Parallel Session at DIS2013
We use new AdS/QCD Distribution Amplitudes (DAs), derived from the meson AdS/QCD light-front wave function, in order to investigate radiative B decays to light vector mesons. When computing the annihilation diagrams in B \to \rho + \gamma and the isospin asymmetry in B \to K* + \gamma, we find that the AdS/QCD DAs do not lead to the end-point divergences encountered with standard QCD Sum...
Dr
Iain Bertram
(Lancaster University)
23/04/2013, 16:30
Heavy Flavours
Talk in Parallel Session at DIS2013
We present new and recent heavy-flavor results from the D0 Experiment, using the full ~10 fb-1 sample of ppbar collisions collected at sqrt(s) = 1.96 TeV, at the Tevatron collider.
The semileptonic mixing asymmetries in B^0 (a^d_sl) and B_s^0 (a^s_sl) decays are extracted independently, with data-driven methods used to correct for reconstruction asymmetries. Both adsl and assl are found to be...
Yuan Xuhao
(Tsinghua)
23/04/2013, 16:50
Heavy Flavours
Talk in Parallel Session at DIS2013
Using the large data sample collected by the CERN LHCb experiment, we present studies of Bc mesons and b baryons, including the first observation of new decay modes of the Bc meson as well as high precision mass measurements. The polarization amplitudes in Lambda_b -> J/psi Lambda_0 decay are measured together with measurements of the transverse polarisation of Lambda_b baryons produced in...
Vladimir Gligorov
(CERN)
23/04/2013, 17:10
Heavy Flavours
Talk in Parallel Session at DIS2013
We present the latest results concerning excited D(s) and B(s) mesons using data collected by the LHCb experiment in proton-proton collision at the LHC. High precision measurements of the masses and widths of the D*s1(2700), D*sJ(2860), B*, Bs1(5830) and B*s2(5840) states are reported. The observation of the new decay mode B*s2 -> B*+K- is also presented.
Xin Shi
(National Taiwan University (TW))
23/04/2013, 17:30
Heavy Flavours
Talk in Parallel Session at DIS2013
Rare beauty decays are usually an excellent probe to the physics beyond the standard model. Especially those decays, that are proceed through flavor-changing neutral currents, can have the interference from new physics with the loop diagrams. Some of these decays are well predicted by the theory, such as B_s,d to mu+mu- branching fractions and the AFB of the B->K*mu+mu-, are the gold plate...
Alastair Dewhurst
(STFC - Science & Technology Facilities Council (GB))
23/04/2013, 17:50
Heavy Flavours
Talk in Parallel Session at DIS2013
Mixing and CP violation is studied by ATLAS in the decay of the Bs meson to J/psi Phi, obnserved in the final state mu+mu-K+K-.
The different amplitudes contributing to the process are studied through the time dependence of the angular distribution.
Measurements of the average lifetime and lifetime difference between the two eigenstate BH and BL, and of the CP violating phase phi_s are...
Semen Turchikhin
(M.V. Lomonosov Moscow State University (RU))
23/04/2013, 18:10
Heavy Flavours
Talk in Parallel Session at DIS2013
The decay of Bd mesons to the final state K*mu+mu- occurs via loop diagrams and is sensitive to physics beyond the Standard Model.
The first study performed by ATLAS, based on data collected in 2011 and including measurements of q-square dependence and angular distribution, will be discussed.
Steffen Rocker
(KIT - Karlsruhe Institute of Technology (DE))
24/04/2013, 08:30
Heavy Flavours
Talk in Parallel Session at DIS2013
Measurements of single top quark production are presented, performed using CMS data collected in 2012 at centre-of-mass energies of 8 TeV. The cross sections for the electroweak production of single top quarks in the t-channel and in association with W-bosons is measured and the results are used to place constraints on the CKM matrix element Vtb. Measurements of top quark properties in single...
Dr
Mikhail Kalmykov
(II. Institut fรผr Theoretische Physik Universitรคt Hamburg Luruper Chaussee 149 22761 Hamburg Germany)
24/04/2013, 08:50
Heavy Flavours
Talk in Parallel Session at DIS2013
The value of electroweak contribution to the ratio between
pole and MSbar masses of top-quark are discussed. We argue that
for a Higgs boson mass M_H ~ 125 GeV,
the electroweak contribution are large and have opposite
sign relative to the QCD contribution
so that the total correction is small and approximately equal to 1 GeV.
This fact reduces the scheme dependence for any...
Javier Brochero Cifuentes
(Universidad de Cantabria (ES))
24/04/2013, 09:10
Heavy Flavours
Talk in Parallel Session at DIS2013
Measurements of the top quark mass are presented, obtained from CMS data collected in 2011 and 2012 at a centre-of-mass energy of 7 TeV and 8 TeV. The mass of the top quark is measured using several methods. The results of the various channels are combined and compared to the world average. The dependence of the top-quark mass measurement on event kinematics is studied. The top mass and also...
Matteo Franchini
(Universita e INFN (IT))
24/04/2013, 09:30
Heavy Flavours
Talk in Parallel Session at DIS2013
Properties of the top quark are measured with the ATLAS detector using LHC proton-proton collisions data. Measurements of the top-quark mass and charge, as well as of the polarization of W bosons in top quark decays to probe the Wtb-vertex are presented.
A search for flavour changing neutral current processes in top quark decays is also presented.
In addition, measurements of the spin...
Efe Yazgan
(Ghent University (BE))
24/04/2013, 09:50
Heavy Flavours
Talk in Parallel Session at DIS2013
Measurements of several top-quark properties are presented, obtained from the CMS data collected in 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV. The results include measurements of the top pair charge asymmetry, the W helicity in top decays, the top quark charge, and of the ttbar spin correlation and the search for anomalous couplings. The fraction of top quarks decaying into a...
James William Howarth
(University of Manchester (GB))
24/04/2013, 10:10
Heavy Flavours
Talk in Parallel Session at DIS2013
In proton-proton collisions at the LHC, pairs of top and anti-top quarks are expected to be
mostly produced through gluon fusion, in contrast to production at the Tevatron, where quark annihilation dominates.
Making use of the large number of top quark pairs, we present measurements of the spin correlation between top and
anti-top quarks as well as of the top-quark charge asymmetry which...
Laura Patel
(Georgia State University)
24/04/2013, 11:00
Heavy Flavours
Talk in Parallel Session at DIS2013
Due to their large mass, heavy quarks are produced in the earliest ย
stages of the collision and will, therefore, experience the full ย
evolution of the system. Leptons resulting from heavy flavor decay are ย
an important tool to probe the hot and dense matter created in nucleus-
nucleus collisions at the Relativistic Heavy Ion Collider (RHIC). ย
PHENIX is capable of measuring electrons...
Dr
Kikola Daniel
(Purdue University)
24/04/2013, 11:20
Heavy Flavours
Talk in Parallel Session at DIS2013
Relativistic heavy ion collisions provide a unique opportunity for studying Quark-Gluon Plasma (QGP), a new state of nuclear matter which properties are determined by quark and gluon degrees of freedom. Such a nuclear matter existed in the Early Universe, a few millionths of a second after the Big Bang. Heavy quarks are unique probes of the QGP properties because they are produced very early...
Dr
Abhisek Sen
(University of Tennessee)
24/04/2013, 11:40
Heavy Flavours
Talk in Parallel Session at DIS2013
The measurement of quarkonia production in relativistic heavy ion collisions provides a powerful tool for studying the properties of hot and dense matter created in these collisions. To have a complete understanding, however, such measurements must cover a wide range of quarkonia states, collision energies and colliding species. The PHENIX detector recently collected high statistics data using...
Jaroslav Bielcik
(Czech Technical University (CZ))
24/04/2013, 12:00
Heavy Flavours
Talk in Parallel Session at DIS2013
The calculations of Quantum Chromodynamics on lattice showed that under conditions of high energy density or high temperature nuclear matter undergoes a phase transition from state of confined quarks and gluons to deconfined state, the Quark-Gluon Plasma (QGP).
Such conditions were present in first moments after the Big Bang
in the early universe and can be created in laboratory by colliding...
Andre Mischke
(Utrecht University (NL))
24/04/2013, 16:30
Heavy Flavours
Talk in Parallel Session at DIS2013
Relativistic nucleus-nucleus collisions allow exploring the behaviour of strongly interacting matter at high temperatures and high energy densities, where a new phase of matter, the Quark-Gluon Plasma (QGP), is predicted to exist. In this phase colour confinement of quarks and gluons into hadrons should vanish.
Heavy-flavour particles, containing charm and beauty, are sensitive probes to...
Diego Stocco
(Laboratoire de Physique Subatomique et des Technologies Associe)
24/04/2013, 16:50
Heavy Flavours
Talk in Parallel Session at DIS2013
The ALICE experiment is designed to study the properties of the high energy density medium formed in ultra-relativistic heavy-ion collisions. The measurement of open charm and beauty production in heavy ion collisions has an important role in the investigation, since it gives access to the mechanisms of heavy-quark propagation and energy loss in the hot and dense QCD matter. Heavy-flavour...
