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Record |
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Author  |
LHCb Collaboration (Aaij, R. et al); Fernandez Casani, A.; Jaimes Elles, S.J.; Jashal, B.K.; Libralon, S.; Lucio Martinez, M.; Martinez-Vidal, F.; Mazorra de Cos, J.; Oyanguren, A.; Rebollo De Miguel, M.; Sanderswood, I.; Svintozelskyi, V.; Velilla Serna, J.; Zhuo, J. |
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Title |
Measurement of the branching fractions and longitudinal polarizations of B(s)0 → K*0(K)over-bar*0 decays |
Type |
Journal Article |
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Year |
2026 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
113 |
Issue |
9 |
Pages |
092002 - 28pp |
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Abstract |
A time- and flavor-integrated amplitude analysis of B-0 and B-s(0) decays to the (K+ pi(-)) (K-pi(+)) final state in the K*(892)(0) (K) over bar*(892)(0) region is presented, using pp collision data recorded with the LHCb detector in 2011-2018, corresponding to an integrated luminosity of 9 fb(-1). The branching fractions of the B-0 and B-s(0) decays are measured relative to the B-0 -> D-pi(+) and B-s(0) up arrow D-s(-) pi(+) modes, respectively. The corresponding longitudinal polarization fractions are found to be f(L)(d) = 0.600 +/- 0.022 +/- 0.017 and f(L)(s) = 0.159 +/- 0.010 +/- 0.007, where the uncertainties are statistical and systematic, respectively. The theory-motivated ratio of the squared B-s(0) to B-0 longitudinally polarized decay amplitudes is found to be L-K*0 (K) over bar *0 = 4.92 +/- 0.55 +/- 0.48 +/- 0.02 +/- 0.10, where the uncertainties are statistical, systematic, due to uncertainty of external mass and lifetime measurements, and due to knowledge of the fragmentation fraction ratio, respectively. This confirms the previously reported tension between experimental determinations and theoretical predictions of longitudinal polarization in B -> VV decays at the level of 4.4 standard deviations. |
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Address |
[Bonacci, R. B.; Dekkers, S.; Egede, U.; Hadavizadeh, T.; Harris, T. H.; Henderson, R. D. L.; Lane, J. J.; Liu, F. L.; Lobo, I.; Song, R.; Walton, E. J.] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia |
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Thesis |
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Publisher |
Amer Physical Soc |
Place of Publication |
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Language |
English |
Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2470-0010 |
ISBN |
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Medium |
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Conference |
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Notes |
WOS:001777537200001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7277 |
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