Measurement Of The Forward Backward Asymmetry In The B To K Mu Mu Decay And First Observation Of The B0 S To Phi Mu Mu Decay
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High Energy Physics Index
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Author :
language : en
Publisher:
Release Date : 1990
High Energy Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Nuclear physics categories.
Measurement Of The Forward Backward Asymmetry In The B To K Mu Mu Decay And First Observation Of The B0 S To Phi Mu Mu Decay
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Author :
language : en
Publisher:
Release Date : 2011
Measurement Of The Forward Backward Asymmetry In The B To K Mu Mu Decay And First Observation Of The B0 S To Phi Mu Mu Decay written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
We reconstruct the rare decays B+ → K+ ?+?−, B° → K*(892)° ?+?−, and B{sub s}° → ?(1020)?+?− in a data sample corresponding to 4.4 fb−1 collected in p{bar p} collisions at √s = 1.96 TeV by the CDF II detector at the Fermilab Tevatron Collider. Using 120 ± 16 B+ → K+ ?+?− and 101 ± 12 B° → K*° ?+?− decays we report the branching ratios. In addition, we report the measurement of the differential branching ratio and the muon forward-backward asymmetry in the B+ and B° decay modes, and the K*° longitudinal polarization in the B° decay mode with respect to the squared dimuon mass. These are consistent with the theoretical prediction from the standard model, and most recent determinations from other experiments and of comparable accuracy. We also report the first observation of the B{sub s}° → ??+?− decay and measure its branching ratio ?(B{sub s}° → ??+?−) = [1.44 ± 0.33 ± 0.46] x 10−6 using 27 ± 6 signal events. This is currently the most rare B{sub s}° decay observed.
Angular Analysis Of The Decay Mathrm B 0 To K 0 Mu Mu From Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2015
Angular Analysis Of The Decay Mathrm B 0 To K 0 Mu Mu From Pp Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The angular distributions and the differential branching fraction of the decay B0→K*(892)0[mu]+[mu]- are studied using data corresponding to an integrated luminosity of 20.5 fb-1 collected with the CMS detector at the LHC in pp collisions at √s = 8 TeV. Additionally, from 1430 signal decays, the forward-backward asymmetry of the muons, the K*(892)0 longitudinal polarization fraction, and the differential branching fraction are determined as a function of the dimuon invariant mass squared. Our measurements are among the most precise to date and are in good agreement with standard model predictions.
Angular Analysis Of The Decay Mathrm B0 To K 0 Mu Mu From Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2015
Angular Analysis Of The Decay Mathrm B0 To K 0 Mu Mu From Pp Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The angular distributions and the differential branching fraction of the decay B0→K*(892)0?+?- are studied using data corresponding to an integrated luminosity of 20.5 fb-1 collected with the CMS detector at the LHC in pp collisions at √s = 8 TeV. Additionally, from 1430 signal decays, the forward–backward asymmetry of the muons, the K*(892)0 longitudinal polarization fraction, and the differential branching fraction are determined as a function of the dimuon invariant mass squared. Our measurements are among the most precise to date and are in good agreement with standard model predictions.
B Physics First Evidence For B S0 Phi Phi Decay And Measurements Of Branching Ratio And A Cp For B Phi K
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Author :
language : en
Publisher:
Release Date : 2005
B Physics First Evidence For B S0 Phi Phi Decay And Measurements Of Branching Ratio And A Cp For B Phi K written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
First Observation Of The Charmless Decay B To K Pi 0 Pi 0 And Study Of Its Dalitz Plot Structure
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Author :
language : en
Publisher:
Release Date : 2012
First Observation Of The Charmless Decay B To K Pi 0 Pi 0 And Study Of Its Dalitz Plot Structure written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Results for the first measurement of the inclusive branching and CP asymmetry of the charmless 3-body decay B+ → K+[pi]0[pi]0 are presented. The analysis uses a data sample with an integrated luminosity of 429.0 fb-1, recorded by the BABAR detector at the PEP-II asymmetric B Factory. This sample corresponds to 470.9 ±} 2.8 million B$\bar{B}$ pairs. Measurements of the branching fractions (B) and CP asymmetries (ACP) of some of the intermediate resonances in the K+[pi]0[pi]0 Dalitz plot are also presented.
A Measurement Of The Bb Forward Backward Asymmetry Using The Decay Into Muo
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Author : DELPHI.
language : en
Publisher:
Release Date : 1992
A Measurement Of The Bb Forward Backward Asymmetry Using The Decay Into Muo written by DELPHI. and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Search For B S D Rightarrow Mu Mu Decays With 10 Fb Of P Overline P Collisions
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Author :
language : en
Publisher:
Release Date : 2013
Search For B S D Rightarrow Mu Mu Decays With 10 Fb Of P Overline P Collisions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
A search for the rare decays of B$^0$$_s$→ [mu]+ [mu]- and B$^0$$_d$ → + [mu]+ [mu]- is presented in p$\bar{p}$ collisions at √s=1.96 TeV corresponding to 10 fb-1 of integrated luminosity collected by the CDF II detector. The observed number of B$^0$$_d$ candidates is consistent with background-only expectations and yields an upper limit on the branching fraction B(B$^0$$_d$ → [mu]+ [mu]-) of 4.2 x 10-9 at 95% confidence level. An excess is observed for the B0s signal region. The probability that background processes alone could produce such an excess or larger is 0.94%. The probability that the combination of background and the expected standard model rate B$^0$$_s$ → [mu]+ [mu]- could produce such an excess or larger is 6.8%. These data are used to determine a central value of B(B$^0$$_s$ → [mu]+ [mu]-) = (1:3+0.9 -0.7) 10-8 as well as a two sided limit at 90% C.L. of 2:2 10-9
Measurement Of Angle Beta With Time Dependent Cpasymmetry In B0 To K K K0 Decays
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Author :
language : en
Publisher:
Release Date : 2007
Measurement Of Angle Beta With Time Dependent Cpasymmetry In B0 To K K K0 Decays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
In the Standard Model (SM) of particle physics, the phase of the Cabibbo-Kobayashi-Maskawa (CKM) quark-mixing matrix [1, 2] is the only source of CP violation in the quark sector. Due to the interference between mixing and decay, this phase can be observed in measurements of time-dependent CP asymmetries of B° mesons. In the SM, CP asymmetries in b 2!s{bar s}s decays, such as B° 2!KK−K°, are expected to be nearly equal to those observed in tree-dominated b 2!{bar c}s decays [3]. However, because in the SM the former are dominated by loop amplitudes, new particles in those loops potentially introduce new physics at the same order as the SM process. Within the SM, deviations from the expected CP asymmetries in B° 2!KK−K° decays depend on the Dalitz plot position, but are expected to be small and positive [4]. In particular, for the decay B° 2![phi]K° they are expected to be less than 4%. BABAR extracts the time-dependent CP-violation parameters by taking into account different amplitudes and phases across the B° and {bar B}° Dalitz plots, while Belle measures it separately for B° 2![phi]K° and the rest of K+K−K° events, neglecting interference between intermediate states. The analyses presented here are based on 347 (535) million B{bar B} pairs collected with the BABAR (Belle) detector at the SLAC PEP-II (KEKB) e+e− asymmetric-energy collider. Data are collected on the [Upsilon](4S) resonance, while a fraction of about 10% is collected at approximately 40 MeV below the [Upsilon](4S) resonance, and it is used to study the background arising from e+e− 2!q{bar q} (q = u, d, s, c) continuum events. The BABAR and Belle detectors are described in detail elsewhere [5].
Measurement Of Branching Fractions And Cp Asymmetries In B Wk Decays And First Observation Of The B0 Psi 2s Pi0 Decay
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Author : Veronika Chobanova
language : en
Publisher:
Release Date : 2015
Measurement Of Branching Fractions And Cp Asymmetries In B Wk Decays And First Observation Of The B0 Psi 2s Pi0 Decay written by Veronika Chobanova and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.