Aubert, B;
Barate, R;
Boutigny, D;
Couderc, F;
Gaillard, JM;
Hicheur, A;
Karyotakis, Y;
... BaBar Collaboration; + view all
(2004)
Measurement of the direct CP asymmetry in b -> s gamma decays.
PHYS REV LETT
, 93
(2)
, Article 021804. 10.1103/PhysRevB.69.021804.
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Abstract
We describe a measurement of the direct CP asymmetry between inclusive b-->sgamma and (b) over bar -->(s) over bar gamma decays. This asymmetry is expected to be less than 0.01 in the standard model, but could be enhanced up to about 0.10 by new physics contributions. We use a sample of 89x10(6) B (B) over bar pairs recorded with the BABAR detector at SLAC PEP-II, from which we reconstruct a set of 12 exclusive b-->sgamma final states containing one charged or neutral kaon and one to three pions. We measure an asymmetry of A(CP)(b-->sgamma)=0.025+/-0.050(stat)+/-0.015(syst), corresponding to an allowed range of -0.06<A(CP)(b-->sgamma)<+0.11 at 90% confidence level.
| Type: | Article |
|---|---|
| Title: | Measurement of the direct CP asymmetry in b -> s gamma decays |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.69.021804 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevB.69.021804 |
| Language: | English |
| Additional information: | The American Physical Society |
| Keywords: | RARE B-DECAYS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1303667 |
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