Conveners
05 - Heavy Quarks Properties (experiment and theory)
- Emi Kou (LAL/IN2P3)
05 - Heavy Quarks Properties (experiment and theory)
- Changzheng YUAN (IHEP, Beijing)
05 - Heavy Quarks Properties (experiment and theory)
- Alex Bondar (Budker Institute for Nuclear Physics (INP))
05 - Heavy Quarks Properties (experiment and theory)
- Marjorie Corcoran (Rice University)
05 - Heavy Quarks Properties (experiment and theory)
- Marjorie Corcoran (Rice University)
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Pierre Artoisenet (The Ohio State University)7/22/10, 9:00โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkIn this talk, I will present recent progress on quarkonium production within NonRelativistic QCD. I will first give a brief introduction of the framework, and discuss the still open questions. I will emphasize the impact of the QCD corrections to several observables, including the pT spectrum and the polarization of J/ฯ and ฮฅ states produced in hadron collisions. After comparing up-to-date...Go to contribution page
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Chaehyun Yu (KIAS)7/22/10, 9:15โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe study the production of two S-wave heavy quarkona at the LHC in the framework of nonrelativistic QCD. We consider the double quarkonium production of same flavour, J/ฯ+J/ฯ or ฮฅ+ฮฅ as well as that of different flavour, J/ฯ+ฮฅ. We calculate the short-distance coefficients in the colour-octet model completely for the first time. Our results for the differential cross section for the J/ฯ+J/ฯ or...Go to contribution page
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Giovanni Passaleva (Istituto Nazionale di Fisica Nucleare (INFN) - Florence)7/22/10, 9:30โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkDespite large experimental and theoretical efforts, the production rate and polarization of quarkonia states in hadronic collisions is not yet satisfactorily understood. With its first ~10 pbโ1 of data, LHCb will be able to provide fresh measurements of the prompt and non-prompt J/ฯ production cross sections, at the new center-of-mass energy of 7 TeV and in a unique range of rapidity (3 < y <...Go to contribution page
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Nuno Leonardo (Purdue)7/22/10, 9:45โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe present the first measurements of the J/ฯ and ฮฅ production cross sections in proton-proton collisions at 7 TeV, as measured by the CMS experiment using the dimuon decay channel. For the J/ฯ we give the inclusive and the prompt differential cross sections, versus transverse momentum, as well as the beauty fraction, statistically separating the two contributions through a fit to the lifetime...Go to contribution page
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Dr Giuseppe Bruno (University and INFN, Bari, Italy)7/22/10, 10:00โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkIn this Conference contribution, we summarize the status of the ongoing analysis on J/ฯ production at central rapidity in pp collisions at sqrt(s)=7 TeV and show the first results. We also give perspectives on the first quarkonium measurements at central rapidity in Pb-Pb collisions which are scheduled by the end of this year.Go to contribution page
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Joseph Michael Izen (University of Texas at Dallas)7/22/10, 10:15โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkA search for charmonium and other new states is performed in a study of exclusive initial-state-radiation production of Ds+Ds-, Ds*+Ds-, and Ds*+Ds*- events from electron-positron annihilations at a center-of-mass energy of 10.58 GeV. The data sample corresponds to an integrated luminosity of 525 fb-1 recorded by the BaBar experiment at the PEP-II storage ring. We also study the decay width...Go to contribution page
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Prof. Matthias Steinhauser (KIT)7/22/10, 11:00โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkThe three-loop corrections to the static potential between a quark and its anti-quark are considered. It constitutes a building block for a number of physical observables connected to heavy quarks. We describe the evaluation of the occurring integrals and discuss the phenomenological implications.Go to contribution page
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LI Gang (IHEP)7/22/10, 11:15โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe present the measurements of charmonium P-wave spin-singlet state h_c made with 106M ฯ' events collected by BESIII at BEPCII. Clear signals are observed for ฯ'->ฯ0 h_c with and without the subsequent radiative decay h_c->ฮณ ฮท_c. First measurements of the absolute branching ratios Br(ฯ'->ฯ0 h_c) = (8.4 ยฑ 1.3 ยฑ 1.0)*10-4 and Br(h_c->ฮณ ฮท_c) = (54.3 ยฑ 6.7 ยฑ 5.2)% are also presented. A...Go to contribution page
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Ronggang Ping (IHEP)7/22/10, 11:30โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWith the high luminosity of electron-positron storage ring at BEPCII and excellent performance of the BESIII spectrometer, BESIII accumulated about 100 million ฯ(2S) data. With the help of these high statistics and high quality data, the radiative decays of ฯ(2S) into light meson P(P = ฯ0, ฮท, ฮท'), and ฯcJ radiative decays to vector meson V (V = ฯ, ฯ, ฯ) , together with ฯcJ decays into...Go to contribution page
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Korneliy Todyshev (BINP)7/22/10, 11:45โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe present a measurement of the mass, total width and leptonic width of the ฯ(3770) meson. Results were obtained using data collected at the ฯ(3770) resonance with the KEDR detector at the electron-positron accelerator complex VEPP-4M. The commonly used fitting procedure does not contain interference ฯ(3770) resonance and non-resonant DDbar cross section. In our analysis we used a...Go to contribution page
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Bryan Fulsom (SLAC National Accelerator Laboratory)7/22/10, 12:00โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe present recent results on quarkonium states from the Babar experiment. We have observed the Y(^3 1 D_J) state of bottomonium in the reaction Y(3S)->ฮณ ฮณ Y(^3 1D_J), ฮณ(^3 1 D_J)->ฯ ฯ Y(1S) with a significance of 6.2 standard deviations. We present a study of the decay Y(1S)->D+* + X produced in the decay Y(2S)->ฯ+ ฯ- Y(1S) using a sample of 98.6 million Y(2S) events. We measure the...Go to contribution page
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Dr Jean-Philippe Lansberg (Ecole polytechnique)7/22/10, 12:15โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkI will discuss the impact of QCD corrections (up to alpha_s^5) to quarkonium production at high energies and the introduction of new observables meant to better discriminate between the different mechanisms at work in quarkonium production at the LHC.Go to contribution page
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Juan Pablo Fernandez (CIEMAT)7/22/10, 2:00โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe report new, world-leading measurements of b-hadron lifetimes and their ratios using B+->J/ฯ K+ , B0->J/ฯ K0*, B0->J/ฯ K0s and ฮb->J/ฯ ฮ, decays reconstructed in a data sample corresponding to 4.3 fb-1 collected by the CDF experiment. A detailed resolution model provides improved systematic uncertainties on the lifetimes, and determination of the b hadron decay-length using only the J/ฯ...Go to contribution page
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Olga Norniella (UIUC)7/22/10, 2:15โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe present new measurements of suppressed decays of the B0s meson to J/ฯ final states at CDF. Using a data sample corresponding to an integrated luminosity of 5 fb-1 of proton-antiproton collisions at sqrt(s)=1.96 TeV, we utilize a low transverse-momentum dimuon trigger to acquire a large sample of J/ฯ->ยต+ยต- decays. We form fully reconstructed B0s candidates using information from the...Go to contribution page
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Jean Wicht (KEK)7/22/10, 2:30โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe present a measurement of the branching fraction for the CP eigenstate decay Bs->J/ฯ f0(980). The result is based on 23.6 fb-1 of data collected at the Y(5S) resonance with the Belle detector at the KEKB asymmetric e+e- collider. We have also searched for Bs0->hh decays, where h stands for a charged or neutral kaon, or a charged pion. We observe the decay Bs0->K+K- and measure its branching...Go to contribution page
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Ms Sevda Esen (University of Cincinnati)7/22/10, 2:45โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkThe large data sample being recorded with the Belle detector at the Y(5S) energy provides a unique opportunity to study the poorly-known Bs meson decays. Following our recent measurement of Bs->Ds ฯ in a sample of 23.6 fb-1, we extend the analysis to include decays with photons in the final state. Using the same sample, we report the first observation of three other dominant exclusive Bs...Go to contribution page
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Vincent Poireau (LAPP CNRS)7/22/10, 3:00โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe present a measurement of the branching fractions of the 22 decay channels B0 and B+ to Dbar^(*) D^(*) K, where Dbar^(*) and D^(*) are fully reconstructed. The B0 and B+ mesons are reconstructed in a sample of hadronic events for all the possible Dbar D K modes, namely B0 -> D^(*)- D^(*)0 K^+, D^(*)-D^(*)+ K^0, Dbar^(*)0 D^(*)0 K0 and B^+ -> Dbar^(*)0 D^(*)+ K0, Dbar^(*)0 D^(*)0 K+, D^(*)-...Go to contribution page
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Thomas Hartmann (University of Rostock)7/22/10, 3:15โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkIn a sample of 467 million BBbar pairs collected with the BaBar detector at the PEP-II collider at SLAC we have observed the decay B0bar->ฮc+ pbar ฯ0 and measured its branching fraction. We determine an upper limit for the branching fraction of the decay B0bar->ฮc+(2455) pbar and observe an enhancement at the threshold of the invariant mass of the baryon-antibaryon pair. We also report the...Go to contribution page
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Prof. Dmitri Melikhov (HEPHY & SINP)7/22/10, 4:15โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe study the decay constants of D, Ds, B, Bs mesons with Borel QCD sum rules, making use of the recent modifications related to the Borel-parameter-dependent effective continuum threshold. For the fixed values of the QCD parameters, our modifications are shown to lead to a visible shift of the extracted value of the decay constant compared to the standard analysis based on a...Go to contribution page
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Dr Nicolas Garron (University of Edinburgh)7/22/10, 4:30โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe present our strategy to compute the b-quark mass and the heavy-strange decay constant, in heavy quark effective theory including 1/m corrections. By matching the effective theory and QCD in a small volume, one can determine non-perturbatively the bare parameters of the HQET Lagrangian and those of the heavy-light currents. The static, kinetic and magnetic energy of the heavy-light meson...Go to contribution page
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Leonard Lesniak (H. Niewodniczanski Institute of Nuclear Physics PAN, Krakow, Poland)7/22/10, 4:45โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkThe two-pion effective mass and helicity angle distributions in the charged B-meson decays into three charged pions are studied. The weak decay amplitudes are calculated in the QCD factorization framework. The final state interactions between the produced pairs of pions are described using strong pion-pion scalar and vector form factors. The scalar form factors are constrained by ...Go to contribution page
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Dr Igor Gorelov (Univ. of New Mexico, USA.)7/22/10, 5:00โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe present a high statistics study of ฮฃb bottom baryon states based on a sample corresponding to 5.3 fb-1 of fully reconstructed ฮb decays collected by the CDF experiment. The first independent mass and widths measurements of all four states ฮฃb*+ and ฮฃb*- are reported.Go to contribution page
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Lea Michaela Caminada (Institut fuer Teilchenphysik - ETHZ)7/22/10, 5:15โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkMeasurements by the CMS experiment of the cross section for inclusive b production in proton-proton collisions at sqrt(s) = 7 TeV are presented. The measurements are based on different methods, such as inclusive jet measurements with secondary vertex tagging or selecting a sample of events containing jets and at least one muon, where the transverse momentum of the muon with respect to the...Go to contribution page
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Achim Geiser (Fachbereich Physik)7/22/10, 5:30โฏPM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkBeauty photoproduction in dijet events has been measured at HERA with the ZEUS detector using an integrated luminosity of 126 pb-1. Beauty was identified in events with a muon in the final state by using the transverse momentum of the muon relative to the closest jet. Lifetime information from the silicon vertex detector was also used; the impact parameter of the muon with respect to the...Go to contribution page
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Markus Bobrowski (University of Regensburg)7/24/10, 9:00โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe investigate the mixing of neutral charmed mesons within the Standard Model (SM), using the framework of Heavy Quark Expansion (HQE). In a recent study, we have argued that a CP phase of the order of 1 per mille to 1 per cent could be present in charm mixing in the SM. Our arguments rely on the enhancement of higher-dimensional terms in the HQE due to a lifting of the severe GIM suppression...Go to contribution page
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David Cassel (Cornell University)7/24/10, 9:15โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkUsing the full CLEO-c D0D0bar, D+D-, and DsbarDs* data samples, we have made precision measurements of many D meson semileptonic branching fractions and form factors. The results for the form factors of exclusive D+ and D0 semileptonic decays to K and ฯ mesons agree well with recent Lattice QCD calculations. Using a non-parametric technique, we measure the form factor for D+->K0*bar e v_e...Go to contribution page
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Prof. Brian Meadows (University of Cincinnati)7/24/10, 9:30โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkThe study of Charm Decays at SuperB provide unique opportunities to understand the Standard Model and constrain new physics, both at the Y(4S), and at charm threshold. We discuss the physics potential of such measurements from the proposed SuperB experiment with 75 ab-1 of data at the Y(4S) and a subsequent run dedicated to exploiting quantum correlations at the charm threshold.Go to contribution page
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Xavier Prudent (Inst. fuer Kern- und Teilchenphysik (IKTP)-Technische Universita)7/24/10, 9:45โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe report on the search for the rare decays B+ -> D+ K0 and B+ -> D+ K*0 decays using 426 fb-1 of data (468 10^6 BBbar pairs) collected at the Upsilon(4S) resonance with the BaBar detector at the PEP-II B factory at SLAC.Go to contribution page
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Grelli Alessandro (Utrecht)7/24/10, 10:00โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkCharm and bottom quarks have been proposed as probes to study hot quark matter produced in high-energy heavy-ion collisions. The detailed understanding of the charm cross-section in proton-proton collisions as well as the production mechanisms is of considerable interest as QCD test tool and as reference calibration for heavy-ion studies. Measurements of D mesons yield in minimum bias...Go to contribution page
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Marco Pappagallo (Universita & INFN, Bari)7/24/10, 10:15โฏAM05 - Heavy Quarks Properties (experiment and theory)Parallel Session TalkWe present a measurement of the absolute branching fraction Br(Ds->ยต v_ยต) and Br(Ds->ฯ v_ฯ) and of the Ds decay constant, f_Ds, using 521 fb-1} of data collected by the BABAR detector at the PEP-II storage rings at SLAC. We also obtained an upper limit on Br(Ds->e v_e). Ds events are detected by reconstructing the recoiling system, D K X ฮณ, in events of the type e+e-->D K X Ds*, where Ds*->Ds...Go to contribution page