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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 |
Measurement of the Branching Fraction Ratios R(D+) and R(D*+) Using Muonic τ Decays |
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Journal Article |
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Year |
2025 |
Publication |
Physical Review Letters |
Abbreviated Journal |
Phys. Rev. Lett. |
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Volume |
134 |
Issue |
6 |
Pages |
061801 - 13pp |
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Abstract |
The branching fraction ratios of (B) over bar (0) -> D+tau(-)(v) over bar (tau) and (B) over bar (0) -> D*(+)tau(-)(v) over bar (tau) decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fb(-1) collected by the LHCb experiment in proton-proton collisions at root s = 13 TeV. The reconstructed final states are formed by combining D+ mesons with tau(-) -> mu(-) (v) over bar (mu)(v) over bar (tau) candidates, where the D+ is reconstructed via the D+ -> K- pi(+) pi(+) decay. The results are R(D+) = 0.249 +/- 0.043 +/- 0.047, R(D*(+)) = 0.402 +/- 0.081 +/- 0.085, where the first uncertainties are statistical and the second systematic. The two measurements have a correlation coefficient of -0.39 and are compatible with the standard model. |
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Address |
[Egede, U.; Fujii, Y.; Hadavizadeh, T.; Henderson, R. D. L.; Lane, J. J.; Liu, F. L.; Song, R.; Walton, E. J.] Monash Univ, Sch Phys & Astron, Melbourne, Australia |
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Publisher |
Amer Physical Soc |
Place of Publication |
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Language |
English |
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Original Title |
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Series Volume |
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Edition |
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ISSN |
0031-9007 |
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Notes |
WOS:001458305500001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6660 |
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