The branching fraction of the rare B0s → ϕ μ+ μ− decay is measured using data collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and 6 fb^−1, respectively. The branching fraction is reported in intervals of q^2, the square of the dimuon invariant mass. In the q^2 region between 1.1 and 6.0 GeV^2/c^4, the measurement is found to lie 3.6 standard deviations below a standard model prediction based on a combination of light cone sum rule and lattice QCD calculations. In addition, the first observation of the rare B0s → f2′(1525) μ+ μ− decay is reported with a statistical significance of 9 standard deviations and its branching fraction is determined.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Branching Fraction Measurements of the Rare B0s → ϕ μ+ μ− and B0s → f2′(1525) μ+ μ− Decays. PHYSICAL REVIEW LETTERS, 127(15), 1-11 [10.1103/PhysRevLett.127.151801].

Branching Fraction Measurements of the Rare B0s → ϕ μ+ μ− and B0s → f2′(1525) μ+ μ− Decays

Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Pisani, F.;Villa, A.;Zucchelli, S.;
2021

Abstract

The branching fraction of the rare B0s → ϕ μ+ μ− decay is measured using data collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and 6 fb^−1, respectively. The branching fraction is reported in intervals of q^2, the square of the dimuon invariant mass. In the q^2 region between 1.1 and 6.0 GeV^2/c^4, the measurement is found to lie 3.6 standard deviations below a standard model prediction based on a combination of light cone sum rule and lattice QCD calculations. In addition, the first observation of the rare B0s → f2′(1525) μ+ μ− decay is reported with a statistical significance of 9 standard deviations and its branching fraction is determined.
2021
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Branching Fraction Measurements of the Rare B0s → ϕ μ+ μ− and B0s → f2′(1525) μ+ μ− Decays. PHYSICAL REVIEW LETTERS, 127(15), 1-11 [10.1103/PhysRevLett.127.151801].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; A...espandi
File in questo prodotto:
File Dimensione Formato  
2021-AR-33-Br_Frac_Meas_of_the_Rare_B0s_to_phi_mup_mum_and-PRL.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 395.56 kB
Formato Adobe PDF
395.56 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/11585/849097
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 124
  • ???jsp.display-item.citation.isi??? 80
social impact