Vladimir Nikolaenko
(Institute for High Energy Physics (RU))
20/11/2012, 14:00
B-physics
Status of B-physics studies in ATLAS is reviewed, starting from Onia results based on dimuon channel. J/psi->mu+mu- decay also serves as a basis for identification of B-mesons and Lambda_b baryons. Results on cross section and lifetime measurements, CP-violation parameters and rare decay searches are also presented.
Bora Akgun
(Rice University (US))
20/11/2012, 14:30
B-physics
The recent results of the CMS experiment in the field of b-quark production, B hadron spectroscopy and decays are reviewed. The B_{s} lifetime difference is measured and the first observation of a new baryon with beauty, the Xi(b)*0 is presented.
Raphaelle Bailhache
(Johann-Wolfgang-Goethe Univ. (DE))
20/11/2012, 15:00
B-physics
In ultra-relativistic heavy-ion collisions, heavy quarks, i.e. charm and beauty, are of particular interest, since they are produced in the early stage of the reaction and coexist with the surrounding medium. Therefore the measurement of open heavy-flavour production in Pb-Pb collisions at the LHC gives access to the mechanisms of heavy-quark transport and energy loss in hot and dense QCD...
Alexander Artamonov
(Institute for High Energy Physics (RU))
20/11/2012, 15:30
Heavy quarkonia
Studies of charm and charmonia production provide important tests of QCD. During 2010 and 2011 the LHCb experiment collected a dataset corresponding to about 1/fb of integrated luminosity in proton-proton collisions at sqrt(s) = 7 TeV. We present measurements of the production of J/psi, psi(2S), chi_c1 and chi_c2 as well as their cross-section ratio, and a cross-section ratio of chi_c to...
Dr
Mikhail Vysotsky
(ITEP)
20/11/2012, 16:30
B-physics
Since most probably Standard Model cannot explain large value of CP asymmetries recently observed in D-meson decays we propose the fourth quark-lepton generation explanation of it. As a byproduct weakly mixed leptons of the fourth generation enable to save the baryon number of the Universe from erasure by sphalerons.
Olga Kochebina
(Universite de Paris-Sud 11 (FR))
20/11/2012, 17:00
B-physics
In this presentation, rare decays of B and D mesons are discussed. Such decays are sensitive to the presence of physics beyond the Standard Model as they are mediated by loop diagrams. New physics can be probed by measuring unexpectedly high branching ratios, CP, isospin and forward backward asymmetries and other angular observables. The last results of LHCb experiment in this field are presented.
Dr
Jianguo Bian
(Institute of High Energy Physics, Beijing, China)
20/11/2012, 17:30
Heavy quarkonia
Using large data samples of di-muon events, CMS has performed detailed measurements in the field of quarkonium production. Differential cross-sections of (prompt) J/psi, psi(2S) and Y(nS) states in pT and rapidity will be presented, as well as studies of P-wave charmonia (chi_c), using the decay mode J/psi + gamma where the photon converts in an e+e- pair inside the detector. All our...
Yiming Li
(Tsinghua University (CN))
20/11/2012, 18:00
B-physics
With large production cross-section and its unique rapidity coverage, the LHCb detector brings opportunity for $b\bar{b}$ bottomonia studies, hence tests for QCD models. We present here the results of $\Upsilon$ and $\chi_b(1P)$ production at $\sqrt{s}$ = 7 TeV. Also discussed here are studies on the $B_c$ meson, including its production and mass measurement using $B_c^{+} \rightarrow J/\psi...
Ivan Polyakov
(ITEP Institute for Theoretical and Experimental Physics (RU))
20/11/2012, 18:30
B-physics
The LHCb experiment is a forward arm spectrometer designed to make high precision measurements of b hadron decays at the LHC. During 2011 a total luminosity of 1.0 fb-1 of data was collected at sqrt(s)=7 TeV. LHCb's efficient dimuon trigger allows to perform studies of B mesons decaying to charmonia with high precision. We will present results on B decays into J/psi and light hadrons, together...
Christoph Mayer
(Polish Academy of Sciences (PL))
21/11/2012, 17:00
Heavy Ions Collisions
The strong electro-magnetic fields produced by ultra-relativistic heavy ions allow for the study of gamma-gamma and gamma-nucleus processes at the CERN Large Hadron Collider. Here, we report first results obtained by ALICE on the J/psi photo-production cross section in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV, both at forward rapidities (-3.6 < y < -2.6) in the mu+mu- channel, and at central...
Dmitry Blau
(National Research Centre Kurchatov Institute (RU))
21/11/2012, 17:30
Heavy Ions Collisions
Identified hadron spectra are considered to be sensitive to transport properties of strongly interacting matter produced in high-energy nucleus-nucleus collisions.
We present measurements of $\pi^0$ and $\eta$ mesons at mid-rapidity in a wide transverse momentum range in pp and Pb-Pb collisions at LHC energies measured with the ALICE detector. The mesons are reconstructed via their two-photon...
Alexandre Shabetai
(Laboratoire de Physique Subatomique et des Technologies Associe)
21/11/2012, 18:00
Heavy Ions Collisions
A cross-over between ordinary nuclear matter and a state of deconfined quarks and gluons, the Quark Gluon Plasma (QGP) is predicted by lattice QCD calculations. Experimentally, ultra-relativistic heavy ion collisions are used to study such a hot and dense medium.
Jets are sensitive to early stage of heavy ion collisions. This property allows to probe the QGP. Their strong interaction with the...
Rishat Sultanov
(ITEP Institute for Theoretical and Experimental Physics (RU))
21/11/2012, 18:30
Heavy Ions Collisions
Jets are an important tool in testing QCD and probing the hot and dense nuclear matter created in high energy heavy-ion collisions. They can be used to study hard scatterings, fragmentation and hadronisation and how this processes differ from baseline vacuum measurements in case of presence of a partonic medium. Vacuum measurements are obtained from proton-proton collisions.
Data taken by...
Saverio D'Auria
(University of Glasgow)
22/11/2012, 14:00
Top quark production and properties
This talk will be a review of the recent Atlas experimental results on top-quark Physics.
Andrew Ivanov
(Kansas State University (US))
22/11/2012, 14:30
Top quark production and properties
We present CMS results on top quark production and properties measurements
Geraldine Conti
(Harvard University (US))
22/11/2012, 15:00
Electroweak phenomena
The measurement of WW, WZ, ZZ, W$\gamma$ and Z$\gamma$ production cross-sections allow for precision tests of the electroweak (EW) dynamics of the Standard Model (SM). Differences between measured and predicted SM cross-sections could prove evidence for new phenomena. The diboson processes are also an important source of background to Higgs production decaying into vector boson pairs, such as...
Matteo Marone
(University of Trieste and INFN)
22/11/2012, 15:30
QCD studies
The associated production of jets and vector bosons allows for stringent tests of perturbative QCD calculations and is sensitive to the possible presence of new physics beyond the Standard Model. Measurements of jet production rates in association with W, Z or photons, in proton-proton collisions at a 7 TeV center-of-mass energy is presented, using data collected with the CMS detector. In...
Simone Pagan Griso
(Lawrence Berkeley National Lab. (US))
22/11/2012, 16:30
Searches for Higgs
During July 2012, the ATLAS and CMS collaboration announced together the observation of a new boson in the Higgs searches, with a mass around 126 GeV.
Since then, the Large Hadron Collider has been running steadly, providing proton-proton collisions at sqrt(s)=8 TeV; both experiments have now more than doubled the amount of data available since July.
I will review the latest results of the...
Christian Schmitt
(Johannes-Gutenberg-Universitaet Mainz (DE))
22/11/2012, 17:00
Searches for Higgs
On July 4th both ATLAS and CMS announced the observation of a new particle in the search for the Higgs boson. The required sensitivity above 5 sigma could only be achieved by combining different search channels and by analysing both the data from 2011 and 2012. Several production and decay modes can shed light on the properties of this new particle, but the full picture can only be obtained by...
Mikhail Kirsanov
(Russian Academy of Sciences (RU))
22/11/2012, 17:30
Searches for Higgs
Results are presented from searches for the standard model (SM) Higgs boson in proton-proton collisions at $\sqrt{s}=7$ and 8 TeV in five decay modes: $gamma \gamma$, $bb$, $\tau \tau$, $WW$, and $ZZ$. The analysed data correspond to integrated luminosities of up to 5.1 1/fb at 7 TeV and 5.3 1/fb at 8 TeV. The data exclude the existence of a SM Higgs boson in the ranges 110--122.5 and 127--600...
Federica Primavera
(Universita e INFN (IT))
22/11/2012, 18:00
Searches for Higgs
In the minimal super-symmetric extension of the Standard Model (MSSM), the Higgs sector contains two Higgs boson doublets, including, after electroweak symmetry breaking, the CP-odd neutral scalar A0, the two charged scalars H±, and the two CP-even neutral scalars h and H0.
The results in the search for neutral and charged Higgs bosons with the CMS detector at LHC
are presented, based on the...
Eduard Boos
(M.V. Lomonosov Moscow State University (RU))
22/11/2012, 18:30
Higgs Phenomenology and lessons from LHC results
Recent discovery of new like a Higgs boson at the LHC stimulated intensive discussions of many arising questions. To which extend the observed resonance corresponds to the SM Higgs, how to extract and measure properties of the resonance such as spin, P and C parities, what are implications to various BSM scenarios assuming not a SM nature of observed boson...? Short review of results of...
