Abstract
The first observation of Z boson production in proton-lead collisions at a
centre-of-mass energy per proton-nucleon pair of √sNN = 5 TeV 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
σZ→µ+µ− (fwd) = 13.5+5.4−4.0(stat.) ± 1.2(syst.) nb
in the direction of the proton beam and
σZ→µ+µ− (bwd) = 10.7+8.4−5.1(stat.) ± 1.0(syst.) nb
in the direction of the lead beam, where the first uncertainty is statistical and the second systematic.
centre-of-mass energy per proton-nucleon pair of √sNN = 5 TeV 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
σZ→µ+µ− (fwd) = 13.5+5.4−4.0(stat.) ± 1.2(syst.) nb
in the direction of the proton beam and
σZ→µ+µ− (bwd) = 10.7+8.4−5.1(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 |
|---|---|
| Article number | 030 |
| Number of pages | 18 |
| Journal | Journal of High Energy Physics |
| Volume | 2014 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2014 |
| Externally published | Yes |
Keywords
- Electroweak interaction
- Heavy Ions
- Heavy-ion collision
- Particle and resonance production
- Forward physics