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تسجيل مستخدم جديدMeasurement of Heavy-Flavor Properties at CMS and ATLAS
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تأليف
Roberto Covarelli
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Thanks to the excellent performances of ATLAS and CMS in triggering on muon signals and reconstructing these particles down to low transverse momentum, large samples of heavy-flavored hadrons have been collected in the 2011 LHC run at sqrt(s) = 7 TeV. The analysis of these samples has enabled both experiments to perform competitive measurements of heavy-flavor properties, such as quarkonium polarization, lifetime and CP-violation measurements, hadron spectroscopy and branching ratios of rare B decays.
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Thanks to the excellent tracking and muon identification performance, combined with a flexible trigger system, the CMS experiment at the Large Hadron Collider is conducting a rich and competitive program of measurements in the field of heavy flavor p
hysics. We review the status of b-quark production cross section measurements in inclusive and exclusive final states, the measurement of B hadron angular correlations, the search for rare $B^0_s$ and $B^0$ decays to dimuons, and the observation of the X(3872) resonance.
A review of the main recent results on top quark production from the ATLAS and CMS experiments is presented. Results on both electroweak single top quark production and strong top pair production are presented.
142 -
N. De Filippis
, for CMS
, ATLAS Collaboration (Laboratoire Leprincen Ringuet - Ecole Polytechnique - IN2P3/CNRS
2009
Prospective searches about Higgs physics and beyond the Standard Model are presented for the CMS and ATLAS experiments. Possible excesses of events in real data could be an indication of the existence of new particles, even with few hundred pb-1 of i
ntegrated luminosity. In this paper the focus is on the current analyses strategies and on the potential both for a discovery and/or for an exclusion of the Standard Model Higgs boson in the main decay channels. The searches for some supersymmetric and exotic particles predicted by several theoretical models are also discussed.
A concise review of precision measurements in the Higgs sector of the Standard Model (SM) of particle physics is given using ATLAS and CMS data. The results are based on LHC Run-2 data, taken between 2015 and 2018. Impressive progress has been made s
ince the discovery of the Higgs boson in 2012 for measuring all major production and decay modes. Good agreement with the SM predictions was observed in all measurements.
Single top-quark t-channel production is exploited for studies of top quark properties. The analyses include the measurement of the CKM matrix element, $|V_{tb}|$, search for anomalous couplings of the top quark using a Bayesian neural network analys
is, measurement of single top-quark polarization which directly confirms the V-A nature of the $tWb$ production vertex, and the measurement of W-helicity fractions in the phase space sampled by a selection optimized for t-channel single top-quark production, orthogonal to the $toverline{t}$ final states used in traditional measurements of these properties. All measurements are found to be consistent with the standard model predictions.
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