The difference in total widths between the Bc+ and B+ mesons is measured using a data sample corresponding to an integrated luminosity of 3.0 fb^−1 collected by the LHCb experiment in 7 and 8 TeV centre-of-mass energy proton–proton collisions at the LHC. Through the study of the time evolution of Bc+ → J/ψ π+ and B+ → J/ψ K+ decays, the width difference is measured to be ΔΓ ≡ Γ_Bc+ − Γ_B+ = 4.46 ± 0.14 ± 0.07 mm^−1 c, where the first uncertainty is statistical and the second systematic. The known lifetime of the B+ meson is used to convert this to a precise measurement of the Bc+ lifetime, τ_Bc+ = 513.4 ± 11.0 ± 5.7 fs, where the first uncertainty is statistical and the second is systematic.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2015). Measurement of the Lifetime of the Bc+ Meson Using the Bc+ → J/ψ π+ Decay Mode. PHYSICS LETTERS. SECTION B, 742, 29-37 [10.1016/j.physletb.2015.01.010].

Measurement of the Lifetime of the Bc+ Meson Using the Bc+ → J/ψ π+ Decay Mode

L. Capriotti;CARBONE, ANGELO;GALLI, DOMENICO;MOGGI, NICCOLO';MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2015

Abstract

The difference in total widths between the Bc+ and B+ mesons is measured using a data sample corresponding to an integrated luminosity of 3.0 fb^−1 collected by the LHCb experiment in 7 and 8 TeV centre-of-mass energy proton–proton collisions at the LHC. Through the study of the time evolution of Bc+ → J/ψ π+ and B+ → J/ψ K+ decays, the width difference is measured to be ΔΓ ≡ Γ_Bc+ − Γ_B+ = 4.46 ± 0.14 ± 0.07 mm^−1 c, where the first uncertainty is statistical and the second systematic. The known lifetime of the B+ meson is used to convert this to a precise measurement of the Bc+ lifetime, τ_Bc+ = 513.4 ± 11.0 ± 5.7 fs, where the first uncertainty is statistical and the second is systematic.
2015
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2015). Measurement of the Lifetime of the Bc+ Meson Using the Bc+ → J/ψ π+ Decay Mode. PHYSICS LETTERS. SECTION B, 742, 29-37 [10.1016/j.physletb.2015.01.010].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A...espandi
File in questo prodotto:
File Dimensione Formato  
2015-AR-03-Meas_of_the_LT_of_the_Bcp_Meson_Using_the_Bcp_to_JPsi_pip-PLB.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 463.53 kB
Formato Adobe PDF
463.53 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/416975
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 44
  • ???jsp.display-item.citation.isi??? 27
social impact