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1	Observation of $Z$ production in proton-lead collisions at LHCb
	Aaij, R.; Amhis, Y.; Barsuk, S.; Borsato, M.; Callot, O.; Kochebina, O.; Lefrançois, J.; Machefert, F.; Martin Sanchez, A.; Nicol, Marie; Robbe, P.; Schune, M.-H.; Teklishyn, M.; Vallier, A.; Viaud, B.; Ben-Haim, E.; Benayoun, M.; David, P.; Del Buono, L.; Martens, A.; Milanes, D.A.; Polci, F.; Ajaltouni, Ziad,; Baalouch, M.; Cogneras, E.; Deschamps, O.; El Rifai, I.; Grabalosa Gándara, M.; Henrard, Pierre; Hoballah, M.; Lefèvre, R.; Maratas, J.; Monteil, S.; Niess, V.; Perret, Pascal; Roa Romero, Diego Alejandro; Beaucourt, L.; Decamp, D.; Déléage, N.; Ghez, Ph.; Lees, J.-P.; Marchand, J.F.; Minard, M.-N.; Pietrzyk, B.; Qian, W.; T'Jampens, S.; Tisserand, V.; Tournefier, E.; Akar, S.; Aslanides, E.; Cogan, J.; Kanso, W.; Legac, R.; Leroy, O.; Mancinelli, G.; Mordà, A.; Perrin-Terrin, M.; Serrano, J.; Tsaregorodtsev, A.
	In: ISSN: 1126-6708 ; EISSN: 1029-8479 ; Journal of High Energy Physics ; http://hal.in2p3.fr/in2p3-01005156 ; Journal of High Energy Physics, Springer, 2014, 09, pp.030. ⟨10.1007/JHEP09(2014)030⟩ (2014)
	Abstract: 19 pages, 3 figures - See paper for full list of authors ; The first observation of $Z$ boson production in proton-lead collisions at a centre-of-mass energy per proton-nucleon pair of $\sqrt{s_{NN}}=5~\text{TeV}$ is presented. The data sample corresponds to an integrated luminosity of $1.6~\text{nb}^{-1}$ 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 $20~\text{GeV}/c$. The invariant dimuon mass is restricted to the range $60-120~\text{GeV}/c^2$. The $Z$ production cross-section is measured to be \begin{eqnarray} \sigma_{Z\to\mu^+\mu^-}(\text{fwd})&=&13.5^{+5.4}_{-4.0}\text{(stat.)}\pm1.2\text{(syst.)}~\text{nb} \end{eqnarray} in the direction of the proton beam and \begin{eqnarray} \sigma_{Z\to\mu^+\mu^-}(\text{bwd}) & =&10.7^{+8.4}_{-5.1}\text{(stat.)}\pm1.0\text{(syst.)}~\text{nb} \end{eqnarray} in the direction of the lead beam, where the first uncertainty is statistical and the second systematic.
	Keyword: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
	URL: http://hal.in2p3.fr/in2p3-01005156 https://doi.org/10.1007/JHEP09(2014)030
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2	Observation of $Z$ production in proton-lead collisions at LHCb
	Aaij, R.; Adeva, B.; Adinolfi, M.. - 2014
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