In:
The European Physical Journal C, Springer Science and Business Media LLC, Vol. 80, No. 3 ( 2020-03)
Kurzfassung:
The cross-sections of $$\psi {(2S)}$$ ψ ( 2 S ) meson production in proton-proton collisions at $$\sqrt{s} =13\text { TeV} $$ s = 13 TeV are measured with a data sample collected by the LHCb detector corresponding to an integrated luminosity of $$275\text { pb} ^{-1} $$ 275 pb - 1 . The production cross-sections for prompt $$\psi {(2S)}$$ ψ ( 2 S ) mesons and those for $$\psi {(2S)}$$ ψ ( 2 S ) mesons from b -hadron decays ( $${\psi {(2S)}} \text{-from- }{b} $$ ψ ( 2 S ) -from- b ) are determined as functions of the transverse momentum, $$p_{\mathrm {T}}$$ p T , and the rapidity, y , of the $$\psi {(2S)}$$ ψ ( 2 S ) meson in the kinematic range $$2 〈 p_{\mathrm {T}} 〈 20\text { GeV/}c $$ 2 〈 p T 〈 20 GeV/ 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 ( prompt ψ ( 2 S ) , 13 TeV ) = 1.430 ± 0.005 (stat) ± 0.099 (syst) μ b , σ ( ψ ( 2 S ) -from- b , 13 TeV ) = 0.426 ± 0.002 (stat) ± 0.030 (syst) μ b . A new measurement of $$\psi {(2S)}$$ ψ ( 2 S ) production cross-sections in pp collisions at $$\sqrt{s}=7\text { TeV} $$ s = 7 TeV is also performed using data collected in 2011, corresponding to an integrated luminosity of $$614\text { pb} ^{-1} $$ 614 pb - 1 . The integrated production cross-sections in the kinematic range $$3.5 〈 p_{\mathrm {T}} 〈 14\text { GeV/}c $$ 3.5 〈 p T 〈 14 GeV/ 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 ( prompt ψ ( 2 S ) , 7 TeV ) = 0.471 ± 0.001 (stat) ± 0.025 (syst) μ b , σ ( ψ ( 2 S ) -from- b , 7 TeV ) = 0.126 ± 0.001 (stat) ± 0.008 (syst) μ b . All results show reasonable agreement with theoretical calculations.
Materialart:
Online-Ressource
ISSN:
1434-6044
,
1434-6052
DOI:
10.1140/epjc/s10052-020-7638-y
Sprache:
Englisch
Verlag:
Springer Science and Business Media LLC
Publikationsdatum:
2020
ZDB Id:
1397769-6
ZDB Id:
1459069-4
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