A key ingredient to searches for physics beyond the Standard Model in B0s mixing phenomena is the measurement of the B0s–anti-B0s oscillation frequency, which is equivalent to the mass difference Δms of the B0s mass eigenstates. Using the world's largest B0s meson sample accumulated in a dataset, corresponding to an integrated luminosity of 1.0 fb^−1, collected by the LHCb experiment at the CERN LHC in 2011, a measurement of Δms is presented. A total of about 34000 B0s → Ds− π+ signal decays are reconstructed, with an average decay time resolution of 44 fs. The oscillation frequency is measured to be Δms = 17.768 ± 0.023 (stat) ± 0.006 (syst) ps^−1, which is the most precise measurement to date.

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2013). Precision Measurement of the B0s–anti-B0s Oscillation Frequency with the Decay B0s → Ds− π+. NEW JOURNAL OF PHYSICS, 15(5), 1-15 [10.1088/1367-2630/15/5/053021].

Precision Measurement of the B0s–anti-B0s Oscillation Frequency with the Decay B0s → Ds− π+

CARBONE, ANGELO;GALLI, DOMENICO;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2013

Abstract

A key ingredient to searches for physics beyond the Standard Model in B0s mixing phenomena is the measurement of the B0s–anti-B0s oscillation frequency, which is equivalent to the mass difference Δms of the B0s mass eigenstates. Using the world's largest B0s meson sample accumulated in a dataset, corresponding to an integrated luminosity of 1.0 fb^−1, collected by the LHCb experiment at the CERN LHC in 2011, a measurement of Δms is presented. A total of about 34000 B0s → Ds− π+ signal decays are reconstructed, with an average decay time resolution of 44 fs. The oscillation frequency is measured to be Δms = 17.768 ± 0.023 (stat) ± 0.006 (syst) ps^−1, which is the most precise measurement to date.
2013
R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2013). Precision Measurement of the B0s–anti-B0s Oscillation Frequency with the Decay B0s → Ds− π+. NEW JOURNAL OF PHYSICS, 15(5), 1-15 [10.1088/1367-2630/15/5/053021].
R. Aaij; C. Abellan Beteta; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/138227
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