The first observation of the rare decay Bs0→φπ+π- and evidence for B0→φπ+π- are reported, using pp collision data recorded by the LHCb detector at center-of-mass energies s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1. The branching fractions in the π+π- invariant mass range 400<1600 MeV/c2 are [3.48±0.23±0.17±0.35]×10-6 and [1.82±0.25±0.41±0.14]×10-7 for Bs0→φπ+π- and B0→φπ+π- respectively, where the uncertainties are statistical, systematic and from the normalization mode Bs0→φφ. A combined analysis of the π+π- mass spectrum and the decay angles of the final-state particles identifies the exclusive decays Bs0→φf0(980), Bs0→φf2(1270), and Bs0→φρ0 with branching fractions of [1.12±0.16-0.08+0.09±0.11]×10-6, [0.61±0.13-0.05+0.12±0.06]×10-6 and [2.7±0.7±0.2±0.2]×10-7, respectively.

Observation of the decay Bs0 →φπ+π- and evidence for B0 →φπ+π- / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 95:1(2017), pp. N/A-N/A. [10.1103/PhysRevD.95.012006]

Observation of the decay Bs0 →φπ+π- and evidence for B0 →φπ+π-

Bizzeti A.;
2017

Abstract

The first observation of the rare decay Bs0→φπ+π- and evidence for B0→φπ+π- are reported, using pp collision data recorded by the LHCb detector at center-of-mass energies s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1. The branching fractions in the π+π- invariant mass range 400<1600 MeV/c2 are [3.48±0.23±0.17±0.35]×10-6 and [1.82±0.25±0.41±0.14]×10-7 for Bs0→φπ+π- and B0→φπ+π- respectively, where the uncertainties are statistical, systematic and from the normalization mode Bs0→φφ. A combined analysis of the π+π- mass spectrum and the decay angles of the final-state particles identifies the exclusive decays Bs0→φf0(980), Bs0→φf2(1270), and Bs0→φρ0 with branching fractions of [1.12±0.16-0.08+0.09±0.11]×10-6, [0.61±0.13-0.05+0.12±0.06]×10-6 and [2.7±0.7±0.2±0.2]×10-7, respectively.
2017
95
1
N/A
N/A
Observation of the decay Bs0 →φπ+π- and evidence for B0 →φπ+π- / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 95:1(2017), pp. N/A-N/A. [10.1103/PhysRevD.95.012006]
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alv...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1209649
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