2026-04-17T07:00:16Zhttps://recercat.cat/oai/requestoai:recercat.cat:20.500.14342/33062025-03-11T04:10:34Zcom_2072_482405com_2072_183628col_2072_482415
RECERCAT
author
Badalov, Alexey
author
Calvo Gómez, Míriam
author
Camboni, Alessandro
author
Vilasís Cardona, Xavier
author
LHCb Collaboration - CERN
2025-03-11T04:10:34Z
2025-03-11T04:10:34Z
2014-05-21
http://hdl.handle.net/20.500.14342/3306
https://doi.org/10.1103/PhysRevLett.112.202001
First observations of the decays Λ0b→Λ+cD−(s) are reported using data corresponding to an integrated luminosity of 3 fb−1 collected at 7 and 8 TeV center-of-mass energies in proton-proton collisions with the LHCb detector. In addition, the most precise measurement of the branching fraction B(B0s→D+D−s) is made and a search is performed for the decays B0(s)→Λ+cΛ−c. The results obtained are B(Λ0b→Λ+cD−)/B(Λ0b→Λ+cD−s)=0.042±0.003(stat)±0.003(syst),[B(Λ0b→Λ+cD−s)B(¯B0→D+D−s)]/[B(Λ0b→Λ+cπ−)B(¯B0→D+π−)]=0.96±0.02(stat)±0.06(syst),B(B0s→D+D−s)/B(¯B0→D+D−s)=0.038±0.004(stat)±0.003(syst),B(¯B0→Λ+cΛ−c)/B(¯B0→D+D−s)<0.0022[95% C.L.],B(B0s→Λ+cΛ−c)/B(B0s→D+D−s)<0.30[95% C.L.].Measurement of the mass of the Λ0b baryon relative to the ¯B0 meson gives M(Λ0b)−M(¯B0)=339.72±0.24(stat)±0.18(syst) MeV/c2. This result provides the most precise measurement of the mass of the Λ0b baryon to date.
eng
Attribution 4.0 International © CERN
Gran col·lisionador d'hadrons (França i Suïssa)
Col·lisions (Física nuclear)
Partícules (Física nuclear)
Protons
Hadrons
Study of Beauty Hadron Decays into Pairs of Charm Hadrons
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion