Details

Autor(en) / Beteiligte

• Aslanides, E.
• Bachmann, S.
• Balagura, V.
• Bediaga, I.
• Betancourt, C.
• van Beuzekom, M.
• Bezshyiko, Ia
• Blanc, F.
• Boettcher, T.
• Bondar, N.
• Boubdir, M.
• Bowen, E.
• Britton, T.
• Chen, S.
• Cogneras, E.
• Del Buono, L.
• Dendek, A.
• Dettori, F.
• Dey, B.
• Dijkstra, H.
• Dzhelyadin, R.
• Easo, S.
• Egorychev, V.
• Ferro-Luzzi, M.
• Fitzpatrick, C.
• Franco Lima, V.
• Funk, W.
• Gao, Y.
• Garrido, L.
• Gascon, D.
• Golutvin, A.
• Hatch, M.
• Hill, D.
• Hombach, C.
• Jalocha, J.
• Johnson, D.
• Kandybei, S.
• Komarov, I.
• Kosmyntseva, A.
• Kreplin, K.
• Krokovny, P.
• Lafferty, G.
• Lanfranchi, G.
• Lazzeroni, C.
• Le Gac, R.
• Lefèvre, R.
• Lemos Cid, E.
• Leroy, O.
• Li, T.
• Lionetto, F.
• Luppi, E.
• Lupton, O.
• Maciuc, F.
• Manning, P.
• Mauri, A.
• Morawski, P.
• Muheim, F.
• Mulder, M.
• Neufeld, N.
• Nguyen, T. D.
• Niet, R.
• Nikitin, N.
• Palano, A.
• Palutan, M.
• Pappalardo, L. L.
• Patrignani, C.
• Perret, P.
• Petridis, K.
• Petruzzo, M.
• Popov, A.
• Popov, D.
• Rademacker, J. H.
• Ramos Pernas, M.
• Rangel, M. S.
• Ratnikov, F.
• Raven, G.
• Roiser, S.
• Rollings, A.
• Ruf, T.
• Saitta, B.
• Santimaria, M.
• Savrina, D.
• Schiller, M.
• Semennikov, A.
• Siddi, B. G.
• Sirendi, M.
• Smith, E.
• Smith, I. T.
• Spradlin, P.
• Stone, S.
• Storaci, B.
• Stramaglia, M. E.
• Tilley, M. J.
• Tomassetti, L.
• Vesterinen, M.
• Vitti, M.
• Vorobyev, V.
• Wicht, J.
• Wyllie, K.
• Zhang, Y.

Titel

Measurement of the Bs0 → μ+μ- Branching Fraction and Effective Lifetime and Search for B0 → μ+μ- Decays

Ist Teil von

• Physical review letters, 2017-05, Vol.118 (19)

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2017

Link zum Volltext

Quelle

American Physical Society

Beschreibungen/Notizen

• A search for the rare decays $B^0_s$→$μ$+$μ$- and B0→$μ$+$μ$- is performed at the LHCb experiment using data collected in pp collisions corresponding to a total integrated luminosity of 4.4 fb-1. An excess of $B^0_s$→$μ$+$μ$- decays is observed with a significance of 7.8 standard deviations, representing the first observation of this decay in a single experiment. The branching fraction is measured to be $B$($μ$+$μ$-)=(3.0 ± $0.6^{+0.3}_{-0.2}$) × 10-9, where the first uncertainty is statistical and the second systematic. The first measurement of the $B^0_s$→$μ$+$μ$- effective lifetime, τ($B^0_s$→($μ$+$μ$-) = 2.04 ± 0.44 ± 0.05 ps, is reported. No significant excess of B0→($μ$+$μ$- decays is found, and a 95% confidence level upper limit, $B$(B0→($μ$+$μ$-) < 3.4 × 10-10, is determined. All results are in agreement with the standard model expectations.