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Title

Measurement of the relative width difference of the B 0 ‐ B ¯ 0 $$ {B}^0\hbox{-} {\overline{B}}^0 $$ system with the ATLAS detector

CollaborationWith : Ancu, Lucian Stefan / Bilbao De Mendizabal, Javier / Calace, Noemi / Chatterjee, Avishek / Clark, Allan Geoffrey / Coccaro, Andrea / Delitzsch, Chris Malena / Della Volpe, Domenico / Ferrere, Didier / Gadomski, Szymon / Golling, Tobias / Gonzalez Sevilla, Sergio / Gramling, Johanna Léna / Guescini, Francesco / Iacobucci, Giuseppe / Katre, Akshay / Khoo, Teng Jian / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Miucci, Antonio / Nackenhorst, Olaf / Nessi, Marzio / Paolozzi, Lorenzo / Ristic, Branislav / Schramm, Steven / Sfyrla, Anna / Vallecorsa, Sofia / Wu, Xin
Published in Journal of High Energy Physics. 2016, vol. 1606, p. 081-120
Collection SCOAP3
Abstract This paper presents the measurement of the relative width difference ΔΓ d /Γ d of the B 0 ‐ B ¯ 0 $$ {B}^0\hbox{-} {\overline{B}}^0 $$ system using the data collected by the ATLAS experiment at the LHC in pp collisions at √s = 7 TeV and √s = 8 TeV and corresponding to an integrated luminosity of 25.2 fb −1 . The value of ΔΓ d /Γ d is obtained by comparing the decay-time distributions of B 0 → J / ψK S and B 0 → J / ψK *0 (892) decays. The result is ΔΓ d /Γ d = (−0.1±1.1 (stat.)± 0.9 (syst.)) × 10 −2 . Currently, this is the most precise single measurement of ΔΓ d /Γ d . It agrees with the Standard Model prediction and the measurements by other experiments.
Keywords B physicsHadron-Hadron scattering (experiments)
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arXiv: 1605.07485
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ATLAS COLLABORATION. Measurement of the relative width difference of the B 0 ‐ B ¯ 0 $$ {B}^0\hbox{-} {\overline{B}}^0 $$ system with the ATLAS detector. In: Journal of High Energy Physics, 2016, vol. 1606, p. 081-120. https://archive-ouverte.unige.ch/unige:85594

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Deposited on : 2016-08-02

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