E-viri
PDF
Recenzirano
Odprti dostop
-
G. Alkhazov; M. Andreotti; E. Aslanides; M. Atzeni; A. Baranov; N. Beliy; S. Bifani; F. Blanc; T. J. V. Bowcock; J. Brodzicka; A. Camboni; P. Campana; M. Cattaneo; G. Cavallero; S. Chen; S.-G. Chitic; P. Ciambrone; F. Cindolo; E. Cogneras; L. Cojocariu; T. Colombo; B. Couturier; M. De Cian; D. Decamp; A. Dendek; O. Deschamps; F. Desse; F. Dettori; S. Didenko; F. Dordei; M. Dorigo; G. Dujany; M. Dziewiecki; S. Esen; C. Färber; S. Farry; L. Ferreira Lopes; C. Fitzpatrick; E. Gabriel; S. Gambetta; C. Gaspar; E. Govorkova; B. R. Gruberg Cazon; Yu. Guz; X. Han; M. Heß; D. Johnson; C. Khurewathanakul; R. Kopecna; F. Kress; M. Kucharczyk; G. Lafferty; R. Le Gac; R. Lefèvre; D. Loh; A. Loi; A. Lupato; J. F. Marchand; B. Maurin; R. D. Moise; J. Müller; N. Neri; S. Neubert; C. Nguyen-Mau; A. Nogay; C. J. G. Onderwater; M. Poli Lener; G. Punzi; J. Qin; R. Quagliani; A. Robert; M. Roehrken; M. S. Rudolph; N. Sagidova; V. Salustino Guimaraes; B. Schmidt; P. Seyfert; L. Silva de Oliveira; I. Skiba; B. Souza De Paula; P. Spradlin; M. Stahl; S. Stracka; A. Szabelski; T. Szumlak; M. J. Tilley; M. Traill; A. Tully; N. Tuning; A. Usachov; A. Vagner; M. Veronesi; M. Vesterinen; N. Voropaev; M. Wilkinson; M. R. J. Williams; M. Xu; H. Yin; K. A. Zarebski; J. B. Zonneveld
The European physical journal. C, Particles and fields, 02/2020, Letnik: 80, Številka: 3Journal Article
Abstract The cross-sections of $$\psi {(2S)}$$ ψ(2S) meson production in proton-proton collisions at $$\sqrt{s} =13\text { TeV} $$ s=13TeV are measured with a data sample collected by the LHCb detector corresponding to an integrated luminosity of $$275\text { pb} ^{-1} $$ 275pb-1 . The production cross-sections for prompt $$\psi {(2S)}$$ ψ(2S) mesons and those for $$\psi {(2S)}$$ ψ(2S) mesons from b-hadron decays ($${\psi {(2S)}} \text{-from- }{b} $$ ψ(2S)-from-b ) are determined as functions of the transverse momentum, $$p_{\mathrm {T}}$$ pT , and the rapidity, y, of the $$\psi {(2S)}$$ ψ(2S) meson in the kinematic range $$2<p_{\mathrm {T}} <20\text { GeV/}c $$ 2<pT<20GeV/c and $$2.0<y<4.5$$ 2.0<y<4.5 . The production cross-sections integrated over this kinematic region are $$\begin{aligned} \begin{aligned}&\sigma (\text{ prompt } {\psi {(2S)}},13\text { TeV})\\&\quad =1.430\pm 0.005\text { (stat)} \pm 0.099\text { (syst)} \,\upmu \text {b} ,\\&\sigma ({\psi {(2S)}} \text{-from- }{b},13\text { TeV})\\&\quad =0.426\pm 0.002\text { (stat)} \pm 0.030\text { (syst)} \,\upmu \text {b} . \end{aligned} \end{aligned}$$ σ(promptψ(2S),13TeV)=1.430±0.005(stat)±0.099(syst)μb,σ(ψ(2S)-from-b,13TeV)=0.426±0.002(stat)±0.030(syst)μb. A new measurement of $$\psi {(2S)}$$ ψ(2S) production cross-sections in pp collisions at $$\sqrt{s}=7\text { TeV} $$ s=7TeV is also performed using data collected in 2011, corresponding to an integrated luminosity of $$614\text { pb} ^{-1} $$ 614pb-1 . The integrated production cross-sections in the kinematic range $$3.5<p_{\mathrm {T}} <14\text { GeV/}c $$ 3.5<pT<14GeV/c and $$2.0<y<4.5$$ 2.0<y<4.5 are $$\begin{aligned} \begin{aligned}&\sigma (\text{ prompt } {\psi {(2S)}},7\text { TeV})\\&\quad =0.471\pm 0.001\text { (stat)} \pm 0.025\text { (syst)} \,\upmu \text {b} ,\\&\sigma ({\psi {(2S)}} \text{-from- }{b},7\text { TeV})\\&\quad =0.126\pm 0.001\text { (stat)} \pm 0.008\text { (syst)} \,\upmu \text {b} . \end{aligned} \end{aligned}$$ σ(promptψ(2S),7TeV)=0.471±0.001(stat)±0.025(syst)μb,σ(ψ(2S)-from-b,7TeV)=0.126±0.001(stat)±0.008(syst)μb. All results show reasonable agreement with theoretical calculations.
