Conveners
WG5: Heavy Flavours: WG5: Heavy Flavours
- Anze Zupanc (Jozef Stefan Institute)
- Vanya Belyaev (ITEP Institute for Theoretical and Experimental Physics (RU))
- Martin Gorbahn (Liverpool University)
WG5: Heavy Flavours
- Martin Gorbahn (Liverpool University)
- Vanya Belyaev (ITEP Institute for Theoretical and Experimental Physics (RU))
- Anze Zupanc (Jozef Stefan Institute)
WG5: Heavy Flavours
- Martin Gorbahn (Liverpool University)
- Vanya Belyaev (ITEP Institute for Theoretical and Experimental Physics (RU))
- Anze Zupanc (Jozef Stefan Institute)
Alessandro Grelli
(University of Utrecht (NL))
4/30/14, 8:30 AM
WG5: Heavy Flavours
Oral presentation
Heavy-flavour hadrons containing charm and beauty quarks are unique probes of the properties of the hot and dense QCD medium produced in heavy-ion collisions. Due to their large masses, heavy quarks are produced at the initial stage of the collision, almost exclusively via hard partonic scattering processes. Therefore, they are expected to experience the full collision history propagating...
Nataliia Zakharchuk
(Deutsches Elektronen-Synchrotron (DE))
4/30/14, 8:55 AM
WG5: Heavy Flavours
Oral presentation
The cross sections for the photoproduction of $D^\star$ mesons have been measured with the ZEUS detector at HERA at three different $ep$ centre-of-mass energies, $\sqrt{s}$, of 318, 251 and 225\,GeV. For each data set, $D^\star$ mesons were required to have a transverse momentum, $p_T^{D^\star}$, and pseudorapidity, $\eta^{D^\star}$, in the ranges, $1.9 < p_T^{D^\star} < 20$\,GeV and...
Mykhailo Lisovyi
(Deutsches Elektronen-Synchrotron (DE))
4/30/14, 9:20 AM
WG5: Heavy Flavours
Oral presentation
H1 and ZEUS have recently published differential cross sections for $D^\star$ production from their respective final data sets, for photon virtualities $Q^2 > 5$ GeV$^2$. These cross sections are combined at the visible cross section level, taking into account all relevant correlations. This significantly reduces the experimental uncertainties, while theory uncertainties from the combination...
Marta Luszczak
(University of Rzeszow)
4/30/14, 9:45 AM
WG5: Heavy Flavours
Oral presentation
We discuss diffractive production of open charm and bottom mesons at the LHC [1].
The differential cross sections for single- and central-diffractive mechanisms for $c\bar c$ and $b\bar b$ pairs
are calculated in the framework of the Ingelman-Schlein model corrected for absorption effects to include Regge
factorization breaking observed at the Tevatron.
In this approach one assumes that...
Loic Henri Antoine Manceau
(Universita e INFN (IT))
4/30/14, 10:10 AM
WG5: Heavy Flavours
Oral presentation
ALICE is the LHC experiment dedicated to the study of heavy ion collisions where
extreme thermodynamical conditions are supposed to lead to the creation of a deconfined
QCD state of matter called Quark-Gluon Plasma (QGP). Amongst the prominent probes
of the QGP, heavy quarks are of special interest since they are produced in the initial
parton-parton interactions of A-A collisions and...
Nataliia Kovalchuk
(Deutsches Elektronen-Synchrotron (DESY))
4/30/14, 11:05 AM
WG5: Heavy Flavours
Oral presentation
The exclusive deep inelastic electroproduction of $\psi(2S)\rightarrow \mu^+\mu^-$, $\psi(2S)\rightarrow J/\psi\pi^+\pi^-\rightarrow \mu^+\mu^-\pi^+\pi^-$ and $J/\psi\rightarrow \mu^+\mu^-$ have been studied with the ZEUS detector at HERA using an integrated luminosity of $354$ pb$^{-1}$. The analysis was carried out in the kinematic range $5 < Q^2 < 70$ GeV$^2$, $30 < W < 210$ GeV and $|t|...
Andrii Gizhko
(Deutsches Elektronen-Synchrotron (DE))
4/30/14, 11:30 AM
WG5: Heavy Flavours
Oral presentation
The 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 $\overline{\rm MS}$ renormalisation scheme. The same data are used differentially as a function of the photon virtuality $Q^2$ to evaluate the charm quark running mass at different physical scales to one-loop order. The scale dependence of...
Aneta Iordanova
(University of California, Riverside)
4/30/14, 11:55 AM
WG5: Heavy Flavours
Oral presentation
The Phenix experiment at RHIC has produced high quality J/$\psi$ measurements in heavy ion interactions for various energies and collision systems. These measurements allow us to study the mechanisms which may modify the charmonium production in the nucleus.
During 2012 run, the flexibility of the RHIC to provide collisions with different nuclei have led to the first experimental study of...
Rob Knegjens
(T)
4/30/14, 2:00 PM
WG5: Heavy Flavours
Oral presentation
I will give a theoretical overview of the rare decays $B_{s,d} \to \mu^+ \mu^-$, which have long been promising probes of New Physics.
Notably there has been important progress in predicting the branching ratios for these decays in the Standard Model, which I will present.
This progress is timely in light of recent experimental measurements of these branching ratios, and I will discuss the...
Mikolaj Krzysztof Misiak
(University of Warsaw (PL))
4/30/14, 2:24 PM
WG5: Heavy Flavours
Oral presentation
Loop-mediated rare B-meson decays provide sensitive tests of the Standard Model and constraints on its extensions. I will present a brief review of several recent perturbative calculations that contribute to precise theoretical predictions for $B_{s,d} \to \ell^+ \ell^-$, $B \to X_s \gamma$ and $B \to X_s \ell^+ \ell^-$.
Jaroslaw Pawel Wiechczynski
(Polish Academy of Sciences (PL))
4/30/14, 2:48 PM
WG5: Heavy Flavours
Oral presentation
LHCb has a vast programme of searches for new physics in rare decays of B and D mesons. Recent highlights are presented, inclusing intruiging results from the decays B->K*mumu and B->Kpipigamma. We also report about the observation of a resonance in the decay B+ -> K+ mu+ mu- at low recoil.
Luis PESANTEZ
4/30/14, 3:12 PM
WG5: Heavy Flavours
Oral presentation
Electroweak and radiative penguin processes such as the quark-level b -> s l+ l- and b -> s gamma decays occur only through the FCNC loop or box diagrams in the Standard Model (SM) and so provide a very powerful probe to look for new physics beyond the SM. In this talk, we present recent results from Belle on these decays. For the first time, we measure the forward-backward asymmetry of...
Liang Sun
(University of Cincinnati (US))
4/30/14, 3:36 PM
WG5: Heavy Flavours
Oral presentation
We present recent results obtained with the full data set of about
470 millions B meson pairs recorded by the BABAR experiment
at the PEP-II e+e- storage ring.
In particular we report on studies of B-meson decays via radiative
or electroweak penguins. Sensitivity to New Physics is tested through
measurements of decay rates, rate asymmetries, and CP asymmetries,
in several B -> Xs...
Vladimir Nikolaenko
(Institute for High Energy Physics (RU))
4/30/14, 4:30 PM
WG5: Heavy Flavours
Oral presentation
The large amount of Heavy Flavor data collected by the ATLAS experiment is potentially sensitive to New Physics, which could be evident in processes that are naturally suppressed in the Standard Model. The most recent results on the search for the rare decay Bs (B0) -> mu+mu- are presented. Recent results are also presented on the angular distribution parameters AFB and FL describing the decay...
Dr
Danny van Dyk
(Siegen University)
4/30/14, 4:54 PM
WG5: Heavy Flavours
Oral presentation
We analyse the degree to which the experimental data on $b\to s\gamma$ and $b\to s\ell^+\ell^-$ decays can be described within the Standard Model, and several extensions.
Besides deriving constraints on the $|\Delta B| = |\Delta S| = 1$ Wilson coefficients, we also fit for hadronic parameters in a Bayesian analysis.
Results will be shown for fits to data on $B\to \lbrace X_s,...
Mr
Gilberto Tetlalmatzi-Xolocotzi
(IPPP Durham)
4/30/14, 5:18 PM
WG5: Heavy Flavours
Oral presentation
The talk will provide a general overview of the physics associated with neutral B meson oscillations, in particular on how the study of the mixing observables allows to constrain the space available for new physics.
Special emphasis will be given to the decay rate difference $\Delta \Gamma_d$ of the $B_d$ sector. According to recent model independent studies of new tree-level contributions...
Paul Sail
(University of Glasgow (GB))
4/30/14, 5:42 PM
WG5: Heavy Flavours
Oral presentation
LHCb has performed many word-best mass and lifetime measurements of baryons and mesons containing b and c quarks.
Tatjana Agatonovic-Jovin
(University of Belgrade (RS))
4/30/14, 6:06 PM
WG5: Heavy Flavours
Oral presentation
The ATLAS detector at the LHC is collecting - among others - a large statistics of Lambda_b decays, allowing the study of production and decay properties of this b-flavored hadron. This statistics is what allowed one of the most precise measurements of the Lambda_b lifetime. We will review ATLAS' latest results on the decay properties of this baryon, including the measurement of the parity...
Susan Cheatham
(McGill University (CA))
5/1/14, 8:30 AM
WG5: Heavy Flavours
Oral presentation
A precise understanding of the relative contributions to Charmonium production from prompt and non-prompt production modes is necessary in order to better understand the various charmonium production modes and their properties. We present new, double-differential production cross-section measurements of the J/psi, psi(2S) and X(3872) charmonium states, extending into new kinematic environments...
Gianluigi Cibinetto
(INFN Ferrara)
5/1/14, 9:00 AM
WG5: Heavy Flavours
Oral presentation
Conventional and exotic quarkonia can be produced at the
B factories through several mechanisms, as
initial state radiation, two-photon fusion, and B-meson decays.
We report on the most recent results obtained at BABAR.
Tomasz Skwarnicki
(Syracuse University (US))
5/1/14, 9:20 AM
WG5: Heavy Flavours
Oral presentation
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 studies of the X(3872) properties including its decay rate to Psi(2S)gamma, as well as studies of putative states such as the Z(4430)+.
Umberto Tamponi
(Universita e INFN, Torino (IT))
5/1/14, 9:40 AM
WG5: Heavy Flavours
Oral presentation
Spin effects have a dominant role in the understanding of the dynamic of the Bottomonium system, both in the transitions and in the correlation among light hadrons being produced in their annihilation. Naively we expect a suppression of the transitions with spin flipping terms, but recent results on $\eta$ transitions from $\Upsilon(4S)$ and $\Upsilon(5S)$ challenge this approach. The most...
Antonio Vairo
(Institut fuer Theoretische Physik-Ruprecht-Karls-Universitaet H)
5/1/14, 10:00 AM
WG5: Heavy Flavours
Oral presentation
I discuss heavy quarkonium spectroscopy from the perspective of modern effective field theories for non-relativistic particles. These provide a framework suitable to describe in a systematic fashion all the relevant observables (cross-sections, widths, transitions, masses, ...). They may be also extended to describe quarkonia in a medium.
Liang Zhong
(Tsinghua University (CN))
5/1/14, 11:00 AM
WG5: Heavy Flavours
Oral presentation
The 7 and 8 TeV pp collision data collected by the LHCb experiment during 2011 and 2012 provide a rich sample of heavy flavour production and decays in which to study hadron properties. We present a summary of the recent experimental results from LHCb including studies of D_J mesons decaying to D(*)pi. We also report a search for the doubly charmed baryon Xi_cc^+
Yuji Kato
5/1/14, 11:20 AM
WG5: Heavy Flavours
Oral presentation
Baryon states have provided excellent testing ground of QCD and our understanding of strong interactions. In recent years, there has been much experimental progress in charmed baryons from the Belle and BaBar experiments but there are no experimentally established doubly-charmed baryons. The existing evidence for doubly-charmed baryon \Xi_{cc}^+ from the SELEX experiment has not been...
Andrew Stephen Chisholm
(University of Birmingham (GB))
5/1/14, 11:40 AM
WG5: Heavy Flavours
Oral presentation
ATLAS has performed searches and accurate measurement of heavy hadrons, with results including the first observation of the chi_b(3P) Bottomonium states and the most accurate measurement of the Lambda_b lifetime. New results in this program are discussed, including searches for excited b-hadrons, new decay modes of b-hadrons.
Lucio Anderlini
(Laboratoire d'Annecy de Physique de Particules)
5/1/14, 12:00 PM
WG5: Heavy Flavours
Oral presentation
The Bc meson is the only weakly decaying doubly heavy meson, which makes it an very interesting system to study. LHCb has recently measured its lifetime, mass and many decay channels, including for the first time a decay of the c-quark.
