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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 |
First evidence of violation in beauty baryon to charmonium decays |
Type |
Journal Article |
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Year |
2026 |
Publication |
Science Bulletin |
Abbreviated Journal |
Sci. Bull. |
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Volume |
71 |
Issue |
3 |
Pages |
547-557 |
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Keywords |
Flavour physics; B physics; CP violation; Standard Model; LHCb experiment; Triple-product asymmetries |
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Abstract |
A study of the difference in the CP asymmetries between Lambda(0)(b) -> J/psi p pi(-) and Lambda(0)(b) -> J/psi pK(-)decays, Delta A(CP), is performed using proton-proton collision data collected by the LHCb experiment in the years 2015-2018, corresponding to an integrated luminosity of 6fb(-1). This quantity is measured to be Delta A(CP) = (4.03 +/- 1.18 +/- 0.23)%, where the first uncertainty is statistical and the second is systematic. When combined with the previous LHCb result, a value of Delta A(CP) = (4.31 +/- 1.06 +/- 0.28)% is obtained, corresponding to a significance of 3.9 sigma against the CP symmetry hypothesis. Studies of triple-product asymmetries, which provide an additional probe of CP violation, show no significant deviation from CP symmetry. |
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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.; Monk, M.; Song, R.; Walton, E. J.] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia |
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Publisher |
Elsevier |
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 |
2095-9273 |
ISBN |
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Conference |
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Notes |
WOS:001697434800001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7120 |
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