Precision measurement of the meson mass
R Aaij, C Abellán Beteta, T Ackernley, B Adeva… - Journal of High Energy …, 2020 - Springer
Journal of High Energy Physics, 2020•Springer
A bstract A precision measurement of the\({B} _c^{+}\) meson mass is performed using
proton-proton collision data collected with the LHCb experiment at centre-of-mass energies
of 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 9. 0 fb− 1. The\({B}
_c^{+}\) mesons are reconstructed via the decays\({B} _c^{+}\)→ J/ψπ+,\({B} _c^{+}\)→ J/ψπ+
π− π+,\({B} _c^{+}\to J/\psi p\overline {p}{\pi}^{+}\),\({B} _c^{+}\to J/\psi {D} _s^{+}\),\({B}
_c^{+}\)→ J/ψ D 0 K+ and\({B} _c^{+}\to {B} _s^ 0 {\pi}^{+}\). Combining the results of the …
proton-proton collision data collected with the LHCb experiment at centre-of-mass energies
of 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 9. 0 fb− 1. The\({B}
_c^{+}\) mesons are reconstructed via the decays\({B} _c^{+}\)→ J/ψπ+,\({B} _c^{+}\)→ J/ψπ+
π− π+,\({B} _c^{+}\to J/\psi p\overline {p}{\pi}^{+}\),\({B} _c^{+}\to J/\psi {D} _s^{+}\),\({B}
_c^{+}\)→ J/ψ D 0 K+ and\({B} _c^{+}\to {B} _s^ 0 {\pi}^{+}\). Combining the results of the …
Abstract
A precision measurement of the meson mass is performed using proton-proton collision data collected with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 9. 0 fb− 1. The mesons are reconstructed via the decays→ J/ψπ+,→ J/ψπ+ π− π+,,,→ J/ψ D 0 K+ and. Combining the results of the individual decay channels, the mass is measured to be 6274. 47±0. 27 (stat)±0. 17 (syst) MeV/c 2. This is the most precise measurement of the mass to date. The difference between the and meson masses is measured to be 907. 75±0. 37 (stat)±0. 27 (syst) MeV/c.
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