The result of a search for the decay B(c)(+) B(s)(0) pi+ is presented, using the B(s)(0) D(s)(-)pi+ and B(s)(0) J/psi O channels. The analysis is based on a data sample of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 1 fb(-1) taken at a center-of-mass energy of 7 TeV, and 2 fb(-1) taken at 8 TeV. The decay B(c)(+) B(s)(0)pi+ is observed with significance in excess of 5 standard deviations independently in both decay channels. The measured product of the ratio of cross sections and branching fraction is [sigma(B(c)(+))/sigma(B(s)(0))] * B(B(c)(+) B(s)(0)pi+) = [2.37 ± 0.31 (stat)± 0.11 (syst)(-0.13)(+0.17)(tau(B)(c)(+)))] * 10(-3), in the pseudorapidity range 2<eta(B)<5, where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the B(c)(+) lifetime. This is the first observation of a B meson decaying to another B meson via the weak interaction.

Aaij, R., Carboni, G., Santovetti, E., Ii, (2013). Observation of the decay B(c)(+) B(s)(0)pi+. PHYSICAL REVIEW LETTERS, 111(18), 181801-181801.

Observation of the decay B(c)(+) B(s)(0)pi+

CARBONI, GIOVANNI;SANTOVETTI, EMANUELE;
2013

Abstract

The result of a search for the decay B(c)(+) B(s)(0) pi+ is presented, using the B(s)(0) D(s)(-)pi+ and B(s)(0) J/psi O channels. The analysis is based on a data sample of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 1 fb(-1) taken at a center-of-mass energy of 7 TeV, and 2 fb(-1) taken at 8 TeV. The decay B(c)(+) B(s)(0)pi+ is observed with significance in excess of 5 standard deviations independently in both decay channels. The measured product of the ratio of cross sections and branching fraction is [sigma(B(c)(+))/sigma(B(s)(0))] * B(B(c)(+) B(s)(0)pi+) = [2.37 ± 0.31 (stat)± 0.11 (syst)(-0.13)(+0.17)(tau(B)(c)(+)))] * 10(-3), in the pseudorapidity range 2
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - Fisica Nucleare e Subnucleare
English
Aaij, R., Carboni, G., Santovetti, E., Ii, (2013). Observation of the decay B(c)(+) B(s)(0)pi+. PHYSICAL REVIEW LETTERS, 111(18), 181801-181801.
Aaij, R; Carboni, G; Santovetti, E; Ii,
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/136135
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