Publication

First Measurement of Inclusive B -> X-s eta Decays

Olivier Schneider, Remi Léandre Albert Louvot, Mingkui Wang, Chao Wang, Tagir Aushev, Vladislav Balagura, Jean Wicht, Jing Li
2010
Journal Articles

Abstract

We report a first measurement of inclusive B -> X-s eta decays, where X-s is a charmless state with unit strangeness. The measurement is based on a pseudoinclusive reconstruction technique and uses a sample of 657 x 10(6)B (B) over bar pairs accumulated with the Belle detector at the KEKB e(+)e(-) collider. For M-X1 < 2.6 GeV/c(2), we measure a branching fraction of [26.1 +/- 3.0(stat)(-2.1)(+1.9)(syst)(-7.1)(+4.0)(model)] x 10(-5) and a direct CP asymmetry of A(CP) = 0.13 +/- 0.04(-0.03)(+0.02). Over half of the signal occurs in the range M-X2 > 1.8 GeV/c(2).

Official source

https://infoscience.epfl.ch/entities/publication/bab20bff-9af9-4137-8303-c8e23e55221b

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Olivier Schneider, Remi Léandre Albert Louvot, Mingkui Wang, Chao Wang, Tagir Aushev, Vladislav Balagura, Jean Wicht, Jing Li
2010
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/bab20bff-9af9-4137-8303-c8e23e55221b

About this result

Ontological neighbourhood

Physics

Particle physics: Standard Model

Related concepts (32)

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In particle physics, CP violation is a violation of CP-symmetry (or charge conjugation parity symmetry): the combination of C-symmetry (charge symmetry) and P-symmetry (parity symmetry). CP-symmetry states that the laws of physics should be the same if a particle is interchanged with its antiparticle (C-symmetry) while its spatial coordinates are inverted ("mirror" or P-symmetry). The discovery of CP violation in 1964 in the decays of neutral kaons resulted in the Nobel Prize in Physics in 1980 for its discoverers James Cronin and Val Fitch.

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