Trapping penguins with entangled B mesons

Journal Article · Tue Mar 01 00:00:00 EST 2016 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2016.01.002· OSTI ID:1234185

Dadisman, Ryan; Gardner, Susan; Yan, Xinshuai

Our first direct observation of time-reversal (T) violation in the BBsystem was 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. This 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.

• Research Organization: Univ. of Kentucky, Lexington, KY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: FG02-96ER40989
• OSTI ID: 1234185
• Alternate ID(s): OSTI ID: 1249031
• Journal Information: Physics Letters B, Journal Name: Physics Letters B Vol. 754 Journal Issue: C; ISSN 0370-2693
• Publisher: Elsevier
• Country of Publication: Netherlands
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS