Using a data sample corresponding to an integrated luminosity of 2.0 fb−1, collected by the LHCb experiment, the production of the (1) state in proton–proton collisions at a centre-of-mass energy of √=13 TeV is studied in the rapidity range 2.0<<4.5 and in the transverse momentum range 6.5<14.0GeV. The cross-section for prompt production of (1) mesons relative to that of the / meson is measured using the ⎯⎯⎯ decay mode and is found to be (1)//=1.69±0.15±0.10±0.18. The quoted uncertainties are, in order, statistical, systematic and due to uncertainties on the branching fractions of the /→⎯⎯⎯ and →⎯⎯⎯ decays. The prompt (1) production cross-section is determined to be (1)=1.26±0.11±0.08±0.14μb, where the last uncertainty includes that on the / meson cross-section. The ratio of the branching fractions of -hadron decays to the (1) and / states is measured to be →/→/=0.48±0.03±0.03±0.05, where the last uncertainty is due to those on the branching fractions of the /→⎯⎯⎯ and →⎯⎯⎯ decays. The difference between the / and (1) masses is also determined to be 113.0±0.7±0.1MeV, which is the most precise single measurement of this quantity to date.

Measurement of the ηc(1 S) production cross-section in p p collisions at √s=13TeV / Aaij, R., Beteta, C.A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., Alkhazov, G., Cartelle, P.A., Alves, A.A., Amato, S., Amhis, Y., et al.. - In: EPJ WEB OF CONFERENCES. - ISSN 2101-6275. - 80:3(2020). [10.1140/epjc/s10052-020-7733-0]

Measurement of the ηc(1 S) production cross-section in p p collisions at √s=13TeV

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2020

Abstract

Using a data sample corresponding to an integrated luminosity of 2.0 fb−1, collected by the LHCb experiment, the production of the (1) state in proton–proton collisions at a centre-of-mass energy of √=13 TeV is studied in the rapidity range 2.0<<4.5 and in the transverse momentum range 6.5<14.0GeV. The cross-section for prompt production of (1) mesons relative to that of the / meson is measured using the ⎯⎯⎯ decay mode and is found to be (1)//=1.69±0.15±0.10±0.18. The quoted uncertainties are, in order, statistical, systematic and due to uncertainties on the branching fractions of the /→⎯⎯⎯ and →⎯⎯⎯ decays. The prompt (1) production cross-section is determined to be (1)=1.26±0.11±0.08±0.14μb, where the last uncertainty includes that on the / meson cross-section. The ratio of the branching fractions of -hadron decays to the (1) and / states is measured to be →/→/=0.48±0.03±0.03±0.05, where the last uncertainty is due to those on the branching fractions of the /→⎯⎯⎯ and →⎯⎯⎯ decays. The difference between the / and (1) masses is also determined to be 113.0±0.7±0.1MeV, which is the most precise single measurement of this quantity to date.
2020
B physics; hadron-hadron scattering (experiments); heavy quark production; spectroscopy
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the ηc(1 S) production cross-section in p p collisions at √s=13TeV / Aaij, R., Beteta, C.A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., Alkhazov, G., Cartelle, P.A., Alves, A.A., Amato, S., Amhis, Y., et al.. - In: EPJ WEB OF CONFERENCES. - ISSN 2101-6275. - 80:3(2020). [10.1140/epjc/s10052-020-7733-0]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1466579
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