A measurement of the differential branching fraction of the decay B 0 → K ∗(892)0 μ + μ − is presented together with a determination of the S-wave fraction of the K + π − system in the decay B 0 → K +π− μ + μ −. The analysis is based on pp-collision data corresponding to an integrated luminosity of 3 fb−1 collected with the LHCb experiment. The measurements are made in bins of the invariant mass squared of the dimuon system, q 2. Precise theoretical predictions for the differential branching fraction of B 0 → K ∗(892)0 μ + μ − decays are available for the q 2 region 1.1 < q 2 < 6.0 GeV2 /c 4. In this q 2 region, for the K +π− invariant mass range 796 < m Kπ < 996 MeV/c 2, the S-wave fraction of the K +π− system in B 0 → K +π− μ + μ − decays is found to beS=0.101±0.017(stat)±0.009(syst),and the differential branching fraction of B 0 → K ∗(892)0 μ + μ − decays is determined to bed/d2=(0.392+0.020−0.019(stat)±0.010(syst)±0.027(norm))×10−74/GeV2.The differential branching fraction measurements presented are the most precise to date and are found to be in agreement with Standard Model predictions.

Measurements of the S-wave fraction in B0→ K+π−μ+μ−decays and the B0→ K∗(892)0μ+μ−differential branching fraction / The LHCb, C., 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., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2016:11(2016), pp. 1-30. [10.1007/JHEP11(2016)047]

Measurements of the S-wave fraction in B0→ K+π−μ+μ−decays and the B0→ K∗(892)0μ+μ−differential branching fraction

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2016

Abstract

A measurement of the differential branching fraction of the decay B 0 → K ∗(892)0 μ + μ − is presented together with a determination of the S-wave fraction of the K + π − system in the decay B 0 → K +π− μ + μ −. The analysis is based on pp-collision data corresponding to an integrated luminosity of 3 fb−1 collected with the LHCb experiment. The measurements are made in bins of the invariant mass squared of the dimuon system, q 2. Precise theoretical predictions for the differential branching fraction of B 0 → K ∗(892)0 μ + μ − decays are available for the q 2 region 1.1 < q 2 < 6.0 GeV2 /c 4. In this q 2 region, for the K +π− invariant mass range 796 < m Kπ < 996 MeV/c 2, the S-wave fraction of the K +π− system in B 0 → K +π− μ + μ − decays is found to beS=0.101±0.017(stat)±0.009(syst),and the differential branching fraction of B 0 → K ∗(892)0 μ + μ − decays is determined to bed/d2=(0.392+0.020−0.019(stat)±0.010(syst)±0.027(norm))×10−74/GeV2.The differential branching fraction measurements presented are the most precise to date and are found to be in agreement with Standard Model predictions.
2016
B physics; hadron-hadron scattering (experiments); rare decay
01 Pubblicazione su rivista::01a Articolo in rivista
Measurements of the S-wave fraction in B0→ K+π−μ+μ−decays and the B0→ K∗(892)0μ+μ−differential branching fraction / The LHCb, C., 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., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2016:11(2016), pp. 1-30. [10.1007/JHEP11(2016)047]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074135
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