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Bounds on the CP asymmetry in b -> s gamma decays
Journal article   Peer reviewed

Bounds on the CP asymmetry in b -> s gamma decays

T E Coan, Fadeyev, Y Maravin, Narsky, R Stroynowski, J Ye, T Wlodek, M Artuso, R Ayad, C Boulahsuache, …
Physical review letters, Vol.86(25), pp.5661-5665
18/06/2001
DOI: https://doi.org/10.1103/PhysRevLett.86.5661
PMID: 11415327

Abstract

Physical Sciences Physics Physics, Multidisciplinary Science & Technology
We have measured the CP asymmetry A(CP) equivalent to [Gamma (b --> sy) - Gamma((b) over bar --> ($) over bar gamma)]/[Gamma (b --> s gamma) + Gamma((b) over bar --> (s) over bar gamma)] to be A(CP) = (-0.079 +/- 0.108 +/- 0.022)(1.0 +/- 0.030), implying that, at 90% confidence level, A(CP) lies between -0.27 and +/- 0.10. These limits rule out some extreme non-standard-model predictions, but are consistent with most, as well as with the standard model.

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