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dc.date.accessioned | 2019-09-11T14:35:44Z | |
dc.date.available | 2019-09-11T14:35:44Z | |
dc.date.issued | 2016-01-05 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/80966 | |
dc.description.abstract | The decays B+c→J/ψD+s and B+c→J/ψD*+s are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb−1 of pp collisions collected at centre-of-mass energies √s=7 TeV and 8 TeV, respectively. Signal candidates are identified through J/ψ→μ+μ− and D(*)+s→ϕπ+(γ/π0) decays. With a two-dimensional likelihood fit involving the B+c reconstructed invariant mass and an angle between the μ+ and D+s candidate momenta in the muon pair rest frame, the yields of B+c→J/ψD+s and B+c→J/ψD*+s, and the transverse polarisation fraction in B+c→J/ψD*+s decay are measured. The transverse polarisation fraction is determined to be Γ±±(B+c→J/ψD*+s)/Γ(B+c→J/ψD*+s)=0.38±0.23±0.07, and the derived ratio of the branching fractions of the two modes is BB+c→J/ψD*+s/BB+c→J/ψD+s=2.8+1.2−0.8±0.3 , where the first error is statistical and the second is systematic. Finally, a sample of B+c→J/ψπ+ decays is used to derive the ratios of branching fractions BBB+c→J/ψD*+s/BB+c→J/ψπ+=3.8±1.1±0.4±0.2 and BB+c→J/ψD*+s/BB+c→J/ψπ+=10.4±3.1±1.5±0.6, where the third error corresponds to the uncertainty of the branching fraction of D+s→ϕ(K+K−)π+ decay. The available theoretical predictions are generally consistent with the measurement. | en |
dc.language | en | es |
dc.subject | Partículas Elementales | es |
dc.subject | ATLAS detector | es |
dc.subject | la̵rge hadron collider | es |
dc.title | Study of the B+c → J/ψ D+s and B+c→ J/ψ D*+s decays with the ATLAS detector | en |
dc.type | Articulo | es |
sedici.identifier.other | https://doi.org/10.1140/epjc/s10052-015-3743-8 | es |
sedici.identifier.issn | 1434-6052 | es |
sedici.creator.person | Alconada Verzini, María Josefina | es |
sedici.creator.person | Alonso, Francisco | es |
sedici.creator.person | Arduh, Francisco Anuar | es |
sedici.creator.person | Dova, María Teresa | es |
sedici.creator.person | Monticelli, Fernando Gabriel | es |
sedici.creator.person | Wahlberg, Hernán Pablo | es |
sedici.creator.person | The ATLAS Collaboration | es |
sedici.subject.materias | Ciencias Exactas | es |
sedici.subject.materias | Física | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Facultad de Ciencias Exactas | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution 4.0 International (CC BY 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | The European Physical Journal C | es |
sedici.relation.journalVolumeAndIssue | vol. 76, no. 1 | es |