Trapping penguins with entangled B mesons

Ryan Dadisman; Susan Gardner; Xinshuai Yan

doi:10.1016/j.physletb.2016.01.002

Trapping penguins with entangled B mesons

Ryan Dadisman, Susan Gardner, Xinshuai Yan

Physics And Astronomy

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

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 (A_T) 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 language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	754
DOIs	https://doi.org/10.1016/j.physletb.2016.01.002
State	Published - Mar 10 2016

Bibliographical note

Funding Information:
We thank Helen Quinn for helpful suggestions regarding the presentation of our paper, and we thank Klaus Schubert for a discussion of CPT tests in the B-meson system. We acknowledge partial support from the U.S. Department of Energy Office of Nuclear Physics under contract DE-FG02-96ER40989 .

Publisher Copyright:
© 2016.

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/j.physletb.2016.01.002

Cite this

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abstract = "The first direct observation of time-reversal (T) violation in the BB system has been reported by the BaBar Collaboration, employing the method of Ba{\~n}uls and Bernab{\'e}u. 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.",

author = "Ryan Dadisman and Susan Gardner and Xinshuai Yan",

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AU - Yan, Xinshuai

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Trapping penguins with entangled B mesons

Abstract

Bibliographical note

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