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Author  |
LHCb Collaboration (Aaij, R. et al); Jaimes Elles, S.J.; Jashal, B.K.; Libralon, S.; Martinez-Vidal, F.; Oyanguren, A.; Rebollo De Miguel, M.; Sanderswood, I., Zhuo, J. |
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Title |
Precision measurement of the Ξb- baryon lifetime |
Type |
Journal Article |
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Year |
2024 |
Publication |
Physical Review D |
Abbreviated Journal |
Phys. Rev. D |
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Volume |
110 |
Issue |
7 |
Pages |
072002 - 16pp |
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Abstract |
A sample of pp collision data, corresponding to an integrated luminosity of 5.5 fb(-1) and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of the lifetime of the Xi(-)(b) baryon to that of the A(b)(0) baryon, r(tau) equivalent to tau(Xi b-)/tau(Ab0). The value r(tau)= 1.076 +/- 0.013 +/- 0.006 is obtained, where the first uncertainty is statistical and the second systematic. This value is averaged with the corresponding value from Run 1 to obtain r(tau)(Rrun 1,2) = 1.078 +/- 0.012 +/- 0.007. Multiplying by the world -average value of the A(b)(0) lifetime yields r(Xi b-)(Rrun 1,2) = 1.578 +/- 0.018 +/- 0.010 +/- 0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the A(b)(0), lifetime. This measurement improves the precision of the current world average of the Xi(-)(b) lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions. |
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Address |
[Egede, U.; Fujii, Y.; Hadavizadeh, T.; Henderson, R. D. L.; Lane, J. J.; Liu, F. L.; Monk, M.; Song, R.; Walton, E. J.; Ward, J. A.] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia |
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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:001381878100001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6437 |
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