TY - JOUR
T1 - Trapping penguins with entangled B mesons
AU - Dadisman, Ryan
AU - Gardner, Susan
AU - Yan, Xinshuai
N1 - Publisher Copyright:
© 2016.
PY - 2016/3/10
Y1 - 2016/3/10
N2 - The first direct observation of time-reversal (T) violation in the BB system has been reported by the BaBar Collaboration, employing the method of Bañuls and Bernabéu. Given this, we generalize their analysis of the time-dependent T-violating asymmetry (AT) to consider different choices of CP tags for which the dominant amplitudes have the same weak phase. As one application, we find that it is possible to measure departures from the universality of sin(2β) directly. If sin(2β) is universal, as in the Standard Model, the method permits the direct determination of penguin effects in these channels. Our method, although no longer a strict test of T, can yield tests of the sin(2β) universality, or, alternatively, of penguin effects, of much improved precision even with existing data sets.
AB - The first direct observation of time-reversal (T) violation in the BB system has been reported by the BaBar Collaboration, employing the method of Bañuls and Bernabéu. Given this, we generalize their analysis of the time-dependent T-violating asymmetry (AT) to consider different choices of CP tags for which the dominant amplitudes have the same weak phase. As one application, we find that it is possible to measure departures from the universality of sin(2β) directly. If sin(2β) is universal, as in the Standard Model, the method permits the direct determination of penguin effects in these channels. Our method, although no longer a strict test of T, can yield tests of the sin(2β) universality, or, alternatively, of penguin effects, of much improved precision even with existing data sets.
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U2 - 10.1016/j.physletb.2016.01.002
DO - 10.1016/j.physletb.2016.01.002
M3 - Article
AN - SCOPUS:84954528827
SN - 0370-2693
VL - 754
SP - 1
EP - 5
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -