The Cabibbo-suppressed semileptonic decay +→⎯⎯⎯+ is observed for the first time using a sample of pp collisions corresponding to an integrated luminosity of 1.0, 2.0 and 1.7 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The differential branching fraction is measured as a function of the ⎯⎯⎯ invariant mass using the decay mode B+→ J/ψK+ for normalisation. The total branching fraction is measured to be (+→⎯⎯⎯+)=(5.27+0.23−0.24±0.21±0.15)×10−6, where the first uncertainty is statistical, the second systematic and the third is from the uncertainty on the branching fraction of the normalisation channel.

Observation of the semileptonic decay B+→ pp¯ μ+νμ / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amhis, Y., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2020:3(2020). [10.1007/JHEP03(2020)146]

Observation of the semileptonic decay B+→ pp¯ μ+νμ

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2020

Abstract

The Cabibbo-suppressed semileptonic decay +→⎯⎯⎯+ is observed for the first time using a sample of pp collisions corresponding to an integrated luminosity of 1.0, 2.0 and 1.7 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The differential branching fraction is measured as a function of the ⎯⎯⎯ invariant mass using the decay mode B+→ J/ψK+ for normalisation. The total branching fraction is measured to be (+→⎯⎯⎯+)=(5.27+0.23−0.24±0.21±0.15)×10−6, where the first uncertainty is statistical, the second systematic and the third is from the uncertainty on the branching fraction of the normalisation channel.
2020
B physics, Hadron-Hadron scattering (experiments), Heavy quark production, Spectroscopy
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of the semileptonic decay B+→ pp¯ μ+νμ / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amhis, Y., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2020:3(2020). [10.1007/JHEP03(2020)146]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1466666
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