Abstract
The first observation of Z boson production in proton-lead collisions at a centre-of-mass energy per proton-nucleon pair of root(s) N N = 5TeV is presented. The data sample corresponds to an integrated luminosity of 1.6 nb(-1) collected with the LHCb detector. The Z candidates are reconstructed from pairs of oppositely charged muons with pseudorapidities between 2.0 and 4.5 and transverse momenta above 20 GeV/c. The invariant dimuon mass is restricted to the range 60-120 GeV/c. The Z production cross-section is measured to be
sigma(Z ->mu+mu-) (fwd) = 13.5(-4.0)(+5.4)(stat.) +/- 1.2(syst.) nb
in the direction of the proton beam and
sigma(Z ->mu+mu-) (bwd) = 10.7(-5.1)(+8.4)(stat.) +/- 1.0(syst.) nb
in the direction of the lead beam, where the first uncertainty is statistical and the second systematic.
Original language | English |
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Article number | 030 |
Number of pages | 18 |
Journal | Journal of High Energy Physics |
Issue number | 9 |
DOIs | |
Publication status | Published - 3 Sept 2014 |
Keywords / Materials (for Non-textual outputs)
- Electroweak interaction
- Heavy Ions
- Heavy-ion collision
- Particle and resonance production
- Forward physics
- PARTON DISTRIBUTIONS
- BOSON PRODUCTION
- HIGH ENERGIES
- NUCLEAR PDFS
- DEUTERIUM
- DECAY