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Full-Text Articles in Physics
Search For Cp Violation In Tt¯ Production And Decay In Proton-Proton Collisions At √S=8 Tev, M M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, D Noonan, Tuhin S. Roy, Francisco X. Yumiceva, Cms Collaboration
Search For Cp Violation In Tt¯ Production And Decay In Proton-Proton Collisions At √S=8 Tev, M M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, D Noonan, Tuhin S. Roy, Francisco X. Yumiceva, Cms Collaboration
Aerospace, Physics, and Space Science Faculty Publications
The results of a first search for CP violation in the production and decay of top quark-antiquark (tt¯) pairs are presented. The search is based on asymmetries in T-odd, triple-product correlation observables, where T is the time-reversal operator. The analysis uses a sample of proton-proton collisions at s=8 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 19.7 fb−1. Events are selected having one electron or muon and at least four jets. The T-odd observables are measured using four-momentum vectors associated with tt¯ production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with …
Measurement Of The Cp-Violating Weak Phase Φs And The Decay Width Difference Δγs Using The B0s→J/Ψφ(1020)Decay Channel In Pp Collisions At √S=8tev, M M. Baarnand, Vallary Bhopatkar, Marcus Hohlmann, H Kalakhety, D Noonan, Tuhin S. Roy, Francisco X. Yumiceva, Cms Collaboration
Measurement Of The Cp-Violating Weak Phase Φs And The Decay Width Difference Δγs Using The B0s→J/Ψφ(1020)Decay Channel In Pp Collisions At √S=8tev, M M. Baarnand, Vallary Bhopatkar, Marcus Hohlmann, H Kalakhety, D Noonan, Tuhin S. Roy, Francisco X. Yumiceva, Cms Collaboration
Aerospace, Physics, and Space Science Faculty Publications
The CP-violating weak phase φsof the B0smeson and the decay width difference δΓs of the B0slight and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of B0s→J/ψφ(1020)→μ+μ−K+K−decays. The analysed data set corresponds to an integrated luminosity of 19.7 fb−1collected in pp collisions at a centre-of-mass energy of 8 TeV. A total of 49200 reconstructed B0s decays are used to extract the values of φs and δΓs by performing a time-dependent and flavour-tagged angular analysis of the μ+μ−K+K−final state. The weak phase is mea-sured to be φs=−0.075 ±0.097 (stat) ±0.031 (syst)rad, and the …
Observation Of The First Bs--> J/Psi Phi Event In Cms, Stefan M Spanier, Giordano Cerizza
Observation Of The First Bs--> J/Psi Phi Event In Cms, Stefan M Spanier, Giordano Cerizza
Physics and Astronomy Publications and Other Works
Presentation for the International Conference on High Energy Physics, July 2010, Paris, France. The first reconstructed decay of a Bs particle in CMS that is relevant for finding information to explain the matter anti-matter asymmetry in the Universe.
Next-To-Leading Order Qcd Corrections For The B⁰B⁰ Mixing With An Extended Higgs Sector, Jorg Org Urban, Frank Krauss, Ulrich D. Jentschura, Gerhard Soff
Next-To-Leading Order Qcd Corrections For The B⁰B⁰ Mixing With An Extended Higgs Sector, Jorg Org Urban, Frank Krauss, Ulrich D. Jentschura, Gerhard Soff
Physics Faculty Research & Creative Works
We present a calculation of the B0B0 mixing including next-to-leading order (NLO) QCD corrections within the Two-Higgs Doublet Model (2HDM). The QCD corrections at NLO are contained in the factor denoted by η2 which modifies the result obtained at the lowest order of perturbation theory. In the Standard Model case, we confirm the results for η2 obtained by Buras, Jamin and Weisz [Nucl. Phys, B 347 (1990) 491]. The factor η2 is gauge and renormalization prescription invariant and it does not depend on the infrared behaviour of the theory, which constitutes an important test …