First evidence for the decay B0s → μ+μ−
A search for the rare decays B0s→μ+μ− and B0→μ+μ− is performed with data collected in 2011 and 2012 with the LHCb experiment at the Large Hadron Collider. The data samples comprise 1.1 fb−1 of proton-proton collisions at √s=8 TeV and 1.0 fb−1 at √s=7 TeV. We observe an excess of B0s→μ+μ− candidates...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
7 January 2013
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| In: |
Physical review letters
Year: 2013, Volume: 110, Issue: 2, Pages: 1-9 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.110.021801 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.110.021801 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.110.021801 |
| Author Notes: | R. Aaij et al. (LHCb Collaboration) |
MARC
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| 245 | 1 | 0 | |a First evidence for the decay B0s → μ+μ− |c R. Aaij et al. (LHCb Collaboration) |
| 246 | 3 | 3 | |a First evidence for the decay B zero s → mu plus mu minus |
| 264 | 1 | |c 7 January 2013 | |
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| 500 | |a Im Titel sind "0", "+" und "-" jeweils hochgestellt und "s" in B0s tiefgestellt | ||
| 500 | |a LHCb Collaboration: R. Aaij, A. Adametz, O. Aquines Gutierrez, S. Bachmann, A. Bien, J. Blouw, M. Britsch, A. Di Canto, F. Dordei, C. Färber, M. Fontana, E. Gersabeck, S. Hansmann-Menzemer, T. Hartmann, A. Jaeger, K. Kreplin, G. Krocker, C. Linn, J. Marks, M. Meissner, T. Nikodem, D. Popov, M. Schmelling, P. Seyfert, S. Stahl, J. van Tilburg, U. Uwer, D. Volyanskyy, C. Voß, H. Voss, R. Waldi, S. Wandernoth, D. Wiedner, M. Zavertyaev, A. Zhelezov und weitere 573 | ||
| 500 | |a Gesehen am 22.03.2021 | ||
| 520 | |a A search for the rare decays B0s→μ+μ− and B0→μ+μ− is performed with data collected in 2011 and 2012 with the LHCb experiment at the Large Hadron Collider. The data samples comprise 1.1 fb−1 of proton-proton collisions at √s=8 TeV and 1.0 fb−1 at √s=7 TeV. We observe an excess of B0s→μ+μ− candidates with respect to the background expectation. The probability that the background could produce such an excess or larger is 5.3×10−4 corresponding to a signal significance of 3.5 standard deviations. A maximum-likelihood fit gives a branching fraction of B(B0s→μ+μ−)=(3.2+1.5−1.2)×10−9, where the statistical uncertainty is 95% of the total uncertainty. This result is in agreement with the standard model expectation. The observed number of B0→μ+μ− candidates is consistent with the background expectation, giving an upper limit of B(B0→μ+μ−)<9.4×10−10 at 95% confidence level. | ||
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