Trapping penguins with entangled B mesons

Ryan Dadisman, Susan Gardner, Xinshuai Yan

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


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.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - Mar 10 2016

Bibliographical note

Publisher Copyright:
© 2016.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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