The production of J/psi pairs in proton-proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of 37.5 pb(-1) collected with the LHCb detector. The production cross-section for pairs with both J/psi in the rapidity range 2 < y(J/psi) < 4.5 and transverse momentum p(T)(J/psi) < 10 GeV/c is sigma(J/psi J/psi) = 5.1 +/- 1.0 +/- 1.1 nb, where the first uncertainty is statistical and the second systematic.

Observation of J/psi-pair production in pp collisions at root s=7 TeV

VELTRI, MICHELE;
2012-01-01

Abstract

The production of J/psi pairs in proton-proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of 37.5 pb(-1) collected with the LHCb detector. The production cross-section for pairs with both J/psi in the rapidity range 2 < y(J/psi) < 4.5 and transverse momentum p(T)(J/psi) < 10 GeV/c is sigma(J/psi J/psi) = 5.1 +/- 1.0 +/- 1.1 nb, where the first uncertainty is statistical and the second systematic.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11576/2526782
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