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R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, G. Andreassi, M. Andreotti, J. E. Andrews
Onderzoeksoutput › Academic › peer review
A measurement of the differential branching fraction of the decay B-0 -> K* (892)(0) mu(+)mu(-) is presented together with a determination of the S-wave fraction of the K+ pi(-) system in the decay B-0 -> K+ pi-mu(+)mu(-). 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) mu(+) mu(-) 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+pi(-) invariant mass range 796 <m(K pi) <996MeV/c(2), the S-wave fraction of the K+pi(-) system in B-0 -> K+pi(-)mu(+)mu(-) decays is found to be
F-S - 0.101 +/- 0.017(stat) +/- 0: 009(syst),
and the differential branching fraction of B-0 -> K* (892)(0) mu(+)mu(-) decays is determined to be
dB/dq(2) = (0.392(-0.019)(+ 0.020)(stat) +/- 0.010(syst) +/- 0.027(norm)) x 10(-7) c(4)/GeV2.
The differential branching fraction measurements presented are the most precise to date and are found to be in agreement with Standard Model predictions.
Originele taal-2 | English |
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Artikelnummer | 047 |
Aantal pagina's | 30 |
Tijdschrift | Journal of High Energy Physics |
Nummer van het tijdschrift | 11 |
DOI's | |
Status | Published - 8-nov.-2016 |
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