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Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with Wâ μν is reconstructed using muons with a transverse momentum, pT, larger than 25 GeV in the pseudorapidity range 2.0<4.5. The b jets are required to have 50<100GeV and 2.2<4.2, while the transverse component of the sum of the muon and b-jet momenta must satisfy pT>20GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0fb-1 collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production cross sections in the fiducial region are Ï (top)[7TeV]=239±53(stat)±33(syst)±24(theory)fb,Ï (top)[8TeV]=289±43(stat)±40(syst)±29(theory)fb.These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.
First Observation of Top Quark Production in the Forward Region / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreotti, M., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 115:11(2015), pp. 112001-112001. [10.1103/PhysRevLett.115.112001]
First Observation of Top Quark Production in the Forward Region
Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with Wâ μν is reconstructed using muons with a transverse momentum, pT, larger than 25 GeV in the pseudorapidity range 2.0<4.5. The b jets are required to have 50<100GeV and 2.2<4.2, while the transverse component of the sum of the muon and b-jet momenta must satisfy pT>20GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0fb-1 collected at center-of-mass energies of 7 and 8 TeV by LHCb. The inclusive top quark production cross sections in the fiducial region are Ï (top)[7TeV]=239±53(stat)±33(syst)±24(theory)fb,Ï (top)[8TeV]=289±43(stat)±40(syst)±29(theory)fb.These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.
First Observation of Top Quark Production in the Forward Region / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreotti, M., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 115:11(2015), pp. 112001-112001. [10.1103/PhysRevLett.115.112001]
Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1156504
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