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Precision measurement of the ratio of the Lambda(0)(b) to (B)over-bar(0) lifetimes

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Precision measurement of the ratio of the Lambda(0)(b) to (B)over-bar(0) lifetimes

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dc.contributor.author LHCb Collaboration
dc.contributor.author Martínez Vidal, Fernando
dc.contributor.author Oyanguren Campos, Arantza
dc.contributor.author Ruiz Valls, Pablo
dc.date.accessioned 2016-04-19T12:27:11Z
dc.date.available 2016-04-19T12:27:11Z
dc.date.issued 2014
dc.identifier.citation LHCb Collaboration Martínez Vidal, Fernando Oyanguren Campos, Arantza Ruiz Valls, Pablo 2014 Precision measurement of the ratio of the Lambda(0)(b) to (B)over-bar(0) lifetimes Physics Letters B 734 122 130
dc.identifier.uri http://hdl.handle.net/10550/52835
dc.description.abstract The LHCb measurement of the lifetime ratio of the Lambda(0)(b) baryon to the (B) over bar (0) meson is updated using data corresponding to an integrated luminosity of 3.0 fb(-1) collected using 7 and 8 TeV centre-of-mass energy pp collisions at the LHC. The decay modes used are Lambda(0)(b) -> J/psi pK(-) and (B) over bar (0) -> J/psi pi K-+(-), where the pi K-+(-) mass is consistent with that of the (K) over bar*(0)(892) meson. The lifetime ratio is determined with unprecedented precision to be 0.974 +/- 0.006 +/- 0.004, where the first uncertainty is statistical and the second systematic. This result is in agreement with original theoretical predictions based on the heavy quark expansion. Using the current world average of the (B) over bar (0) lifetime, the Lambda(0)(b) lifetime is found to be 1.479 +/- 0.009 +/- 0.010 ps.
dc.language.iso eng
dc.relation.ispartof Physics Letters B, 2014, vol. 734, p. 122-130
dc.subject Física nuclear
dc.title Precision measurement of the ratio of the Lambda(0)(b) to (B)over-bar(0) lifetimes
dc.type journal article es_ES
dc.date.updated 2016-04-19T12:27:11Z
dc.identifier.doi 10.1016/j.physletb.2014.05.021
dc.identifier.idgrec 099501
dc.rights.accessRights open access es_ES

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