dc.contributor |
Universitat Ramon Llull. La Salle |
dc.contributor |
CERN |
dc.contributor.author |
Badalov, Alexey |
dc.contributor.author |
Calvo Gómez, Míriam |
dc.contributor.author |
Vilasís Cardona, Xavier |
dc.contributor.author |
LHCb Collaboration - CERN |
dc.date.accessioned |
2020-06-17T11:59:09Z |
dc.date.available |
2020-06-17T11:59:09Z |
dc.date.created |
2015 |
dc.date.issued |
2015-12-11 |
dc.identifier.uri |
http://hdl.handle.net/2072/376134 |
dc.format.extent |
10 p. |
dc.language.iso |
eng |
dc.publisher |
American Physical Society |
dc.relation.ispartof |
Physical Review Letters, 2015, Vol. 115, No. 24 (Desembre) |
dc.rights |
L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by/4.0/ |
dc.rights |
© CERN |
dc.source |
RECERCAT (Dipòsit de la Recerca de Catalunya) |
dc.subject.other |
Gran col·lisionador d'hadrons (França i Suïssa) |
dc.subject.other |
Partícules (Física nuclear) |
dc.subject.other |
Protons |
dc.subject.other |
Col·lisions (Física nuclear) |
dc.title |
Evidence for the Strangeness-Changing Weak Decay Ξ−b→Λ0bπ− |
dc.type |
info:eu-repo/semantics/article |
dc.type |
info:eu-repo/semantics/publishedVersion |
dc.subject.udc |
53 - Física |
dc.embargo.terms |
cap |
dc.identifier.doi |
https://doi.org/10.1103/PhysRevLett.115.241801 |
dc.rights.accessLevel |
info:eu-repo/semantics/openAccess |
dc.description.abstract |
Using a pp collision data sample corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb detector, we present the first search for the strangeness-changing weak decay Ξ−b→Λ0bπ−. No b hadron decay of this type has been seen before. A signal for this decay, corresponding to a significance of 3.2 standard deviations, is reported. The relative rate is measured to be fΞ−bfΛ0bB(Ξ−b→Λ0bπ−)=(5.7±1.8+0.8−0.9)×10−4,where fΞ−b and fΛ0b are the b→Ξ−b and b→Λ0b fragmentation fractions, and B(Ξ−b→Λ0bπ−) is the branching fraction. Assuming fΞ−b/fΛ0b is bounded between 0.1 and 0.3, the branching fraction B(Ξ−b→Λ0bπ−) would lie in the range from (0.57±0.21)% to (0.19±0.07)%. |