Measurement of exclusive γγ→ℓ\(^{+}\)ℓ\(^{−}\) production in proton–proton collisions at \(\sqrt {s}\)=7 TeV with the ATLAS detector
Please always quote using this URN: urn:nbn:de:bvb:20-opus-144247
- This Letter reports a measurement of the exclusive γγ→ℓ\(^{+}\)ℓ\(^{−}\) (ℓ=e, μℓ=e, μ) cross-section in proton–proton collisions at a centre-of-mass energy of 7 TeV by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb\(^{−1}\). For the electron or muon pairs satisfying exclusive selection criteria, a fit to the dilepton acoplanarity distribution is used to extract the fiducial cross-sections. The cross-section in the electron channel is determined to be \(^{excl.}_{γγ→e^{+}e^{-}}\)=0.428 ± 0.035 (stat.) ± 0.018This Letter reports a measurement of the exclusive γγ→ℓ\(^{+}\)ℓ\(^{−}\) (ℓ=e, μℓ=e, μ) cross-section in proton–proton collisions at a centre-of-mass energy of 7 TeV by the ATLAS experiment at the LHC, based on an integrated luminosity of 4.6 fb\(^{−1}\). For the electron or muon pairs satisfying exclusive selection criteria, a fit to the dilepton acoplanarity distribution is used to extract the fiducial cross-sections. The cross-section in the electron channel is determined to be \(^{excl.}_{γγ→e^{+}e^{-}}\)=0.428 ± 0.035 (stat.) ± 0.018 (syst.) pb for a phase–space region with invariant mass of the electron pairs greater than 24 GeV, in which both electrons have transverse momentum p\(_{T}\)>12 GeV and pseudorapidity |η|<2.4. For muon pairs with invariant mass greater than 20 GeV, muon transverse momentum p\(_{T}\)>10 GeV and pseudorapidity |η|<2.4, the cross-section is determined to be \(^{excl.}_{γγ→μ^{+}μ^{-}}\) =0.628 ± 0.032 (stat.) ± 0.021 (syst.) pb. When proton absorptive effects due to the finite size of the proton are taken into account in the theory calculation, the measured cross-sections are found to be consistent with the theory prediction.…
URN: | urn:nbn:de:bvb:20-opus-144247 |
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Document Type: | Journal article |
Faculties: | Fakultät für Physik und Astronomie / Physikalisches Institut |
Language: | English |
Parent Title (English): | Physics Letters B |
Year of Completion: | 2015 |
Volume: | 749 |
Pagenumber: | 242-261 |
Source: | Physics Letters B 749 (2015) 242-261. DOI: 10.1016/j.physletb.2015.07.069 |
DOI: | https://doi.org/10.1016/j.physletb.2015.07.069 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik |
Tag: | physics |
Release Date: | 2019/01/25 |
Creating Corporation: | ATLAS Collaboration |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |