Multi-lepton production at high transverse momenta in ep collisions at HERA
Abstract
Processes leading to a final state with at least two high transverse momentum leptons (electrons or muons) are studied using the full e(+/-) p data sample collected by the H1 experiment at HERA. The data correspond to an integrated luminosity of 463 pb(-1). Di-lepton and tri-lepton event classes are investigated. Cross sections of the production of e(+)e(-) and mu(+)mu(-) pairs are derived in a restricted phase space dominated by photon-photon collisions. In general, good agreement is found with Standard Model predictions. Events are observed with a total scalar sum of lepton transverse momenta above 100 GeV where the Standard Model expectation is low. In this region, combining di-lepton and tri-lepton classes, five events are observed in e(+) p collisions, compared to a Standard Model expectation of 0.96 +/- 0.12, while no such event is observed in e(-) p data for 0.64 +/- 0.09 expected. (C) 2008 Elsevier B.V. All rights reserved.
Source:
Physics Letters B, 2008, 668, 4, 268-276
DOI: 10.1016/j.physletb.2008.08.057
ISSN: 0370-2693
WoS: 000260480300004
Scopus: 2-s2.0-73849085670
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VinčaTY - JOUR AU - Aaron, F. D. AU - Božović-Jelisavčić, Ivanka AU - Mudrinić, Mihajlo AU - Pandurović, Mila AU - Smiljanić, Ivan PY - 2008 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3552 AB - Processes leading to a final state with at least two high transverse momentum leptons (electrons or muons) are studied using the full e(+/-) p data sample collected by the H1 experiment at HERA. The data correspond to an integrated luminosity of 463 pb(-1). Di-lepton and tri-lepton event classes are investigated. Cross sections of the production of e(+)e(-) and mu(+)mu(-) pairs are derived in a restricted phase space dominated by photon-photon collisions. In general, good agreement is found with Standard Model predictions. Events are observed with a total scalar sum of lepton transverse momenta above 100 GeV where the Standard Model expectation is low. In this region, combining di-lepton and tri-lepton classes, five events are observed in e(+) p collisions, compared to a Standard Model expectation of 0.96 +/- 0.12, while no such event is observed in e(-) p data for 0.64 +/- 0.09 expected. (C) 2008 Elsevier B.V. All rights reserved. T2 - Physics Letters B T1 - Multi-lepton production at high transverse momenta in ep collisions at HERA VL - 668 IS - 4 SP - 268 EP - 276 DO - 10.1016/j.physletb.2008.08.057 ER -
@article{ author = "Aaron, F. D. and Božović-Jelisavčić, Ivanka and Mudrinić, Mihajlo and Pandurović, Mila and Smiljanić, Ivan", year = "2008", abstract = "Processes leading to a final state with at least two high transverse momentum leptons (electrons or muons) are studied using the full e(+/-) p data sample collected by the H1 experiment at HERA. The data correspond to an integrated luminosity of 463 pb(-1). Di-lepton and tri-lepton event classes are investigated. Cross sections of the production of e(+)e(-) and mu(+)mu(-) pairs are derived in a restricted phase space dominated by photon-photon collisions. In general, good agreement is found with Standard Model predictions. Events are observed with a total scalar sum of lepton transverse momenta above 100 GeV where the Standard Model expectation is low. In this region, combining di-lepton and tri-lepton classes, five events are observed in e(+) p collisions, compared to a Standard Model expectation of 0.96 +/- 0.12, while no such event is observed in e(-) p data for 0.64 +/- 0.09 expected. (C) 2008 Elsevier B.V. All rights reserved.", journal = "Physics Letters B", title = "Multi-lepton production at high transverse momenta in ep collisions at HERA", volume = "668", number = "4", pages = "268-276", doi = "10.1016/j.physletb.2008.08.057" }
Aaron, F. D., Božović-Jelisavčić, I., Mudrinić, M., Pandurović, M.,& Smiljanić, I.. (2008). Multi-lepton production at high transverse momenta in ep collisions at HERA. in Physics Letters B, 668(4), 268-276. https://doi.org/10.1016/j.physletb.2008.08.057
Aaron FD, Božović-Jelisavčić I, Mudrinić M, Pandurović M, Smiljanić I. Multi-lepton production at high transverse momenta in ep collisions at HERA. in Physics Letters B. 2008;668(4):268-276. doi:10.1016/j.physletb.2008.08.057 .
Aaron, F. D., Božović-Jelisavčić, Ivanka, Mudrinić, Mihajlo, Pandurović, Mila, Smiljanić, Ivan, "Multi-lepton production at high transverse momenta in ep collisions at HERA" in Physics Letters B, 668, no. 4 (2008):268-276, https://doi.org/10.1016/j.physletb.2008.08.057 . .