Measurement of CP asymmetry in Bs0 → Ds∓K± decays

被引：0

作者：

R. Aaij

B. Adeva

M. Adinolfi

A. Affolder

Z. Ajaltouni

S. Akar

J. Albrecht

F. Alessio

M. Alexander

S. Ali

G. Alkhazov

P. Alvarez Cartelle

A. A. Alves

S. Amato

S. Amerio

Y. Amhis

L. An

L. Anderlini

J. Anderson

R. Andreassen

M. Andreotti

J. E. Andrews

R. B. Appleby

O. Aquines Gutierrez

F. Archilli

A. Artamonov

M. Artuso

E. Aslanides

G. Auriemma

M. Baalouch

S. Bachmann

J. J. Back

A. Badalov

W. Baldini

R. J. Barlow

C. Barschel

S. Barsuk

W. Barter

V. Batozskaya

V. Battista

A. Bay

L. Beaucourt

J. Beddow

F. Bedeschi

I. Bediaga

S. Belogurov

K. Belous

I. Belyaev

E. Ben-Haim

G. Bencivenni

机构：

[1] Centro Brasileiro de Pesquisas Físicas (CBPF),Center for High Energy Physics

[2] Universidade Federal do Rio de Janeiro (UFRJ),Fakultät Physik

[3] Tsinghua University,Physikalisches Institut

[4] LAPP,School of Physics

[5] Université de Savoie,Institute of Nuclear Physics

[6] CNRS/IN2P3,Physik

[7] Clermont Université,Institut

[8] Université Blaise Pascal,H.H. Wills Physics Laboratory

[9] CNRS/IN2P3,Cavendish Laboratory

[10] LPC,Department of Physics

[11] CPPM,School of Physics and Astronomy

[12] Aix-Marseille Université,School of Physics and Astronomy

[13] CNRS/IN2P3,Oliver Lodge Laboratory

[14] LAL,School of Physics and Astronomy

[15] Université Paris-Sud,Department of Physics

[16] CNRS/IN2P3,Institute of Particle Physics

[17] LPNHE,Institut für Physik

[18] Université Pierre et Marie Curie,Instituto de Fisica Corpuscular (IFIC)

[19] Université Paris Diderot,P.N. Lebedev Physical Institute

[20] CNRS/IN2P3,LIFAELS, La Salle

[21] Technische Universität Dortmund,undefined

[22] Max-Planck-Institut für Kernphysik (MPIK),undefined

[23] Ruprecht-Karls-Universität Heidelberg,undefined

[24] University College Dublin,undefined

[25] Sezione INFN di Bari,undefined

[26] Sezione INFN di Bologna,undefined

[27] Sezione INFN di Cagliari,undefined

[28] Sezione INFN di Ferrara,undefined

[29] Sezione INFN di Firenze,undefined

[30] Laboratori Nazionali dell’INFN di Frascati,undefined

[31] Sezione INFN di Genova,undefined

[32] Sezione INFN di Milano Bicocca,undefined

[33] Sezione INFN di Milano,undefined

[34] Sezione INFN di Padova,undefined

[35] Sezione INFN di Pisa,undefined

[36] Sezione INFN di Roma Tor Vergata,undefined

[37] Sezione INFN di Roma La Sapienza,undefined

[38] Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences,undefined

[39] AGH - University of Science and Technology,undefined

[40] Faculty of Physics and Applied Computer Science,undefined

[41] National Center for Nuclear Research (NCBJ),undefined

[42] Horia Hulubei National Institute of Physics and Nuclear Engineering,undefined

[43] Petersburg Nuclear Physics Institute (PNPI),undefined

[44] Institute of Theoretical and Experimental Physics (ITEP),undefined

[45] Moscow State University (SINP MSU),undefined

[46] Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN),undefined

[47] Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University,undefined

[48] Institute for High Energy Physics (IHEP),undefined

[49] Universitat de Barcelona,undefined

[50] Universidad de Santiago de Compostela,undefined

来源：

Journal of High Energy Physics | / 2014卷

关键词：

CP violation; CKM angle gamma; B physics; Flavor physics; Hadron-Hadron Scattering;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We report on measurements of the time-dependent CP violating observables in Bs0 → Ds∓K± decays using a dataset corresponding to 1.0 fb−1 of pp collisions recorded with the LHCb detector. We find the CP violating observables Cf = 0.53±0.25±0.04, AfΔΓ = 0.37 ± 0.42 ± 0.20, Af¯ΔΓ=0.20±0.41±0.20\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {A}_{\overline{f}}^{\varDelta \varGamma }=0.20\pm 0.41\pm 0.20 $$\end{document}, Sf = −1.09±0.33±0.08, Sf¯=−0.36±0.34±0.08\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {S}_{\overline{f}}=-0.36\pm 0.34\pm 0.08 $$\end{document}, where the uncertainties are statistical and systematic, respectively. Using these observables together with a recent measurement of the Bs0 mixing phase −2βs leads to the first extraction of the CKM angle γ from Bs0 → Ds∓K± decays, finding γ = (115− 43+ 28)° modulo 180° at 68% CL, where the error contains both statistical and systematic uncertainties. [graphic not available: see fulltext]

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