Yayınlanmış 1 Ocak 2022
| Sürüm v1
Dergi makalesi
Açık
Measurement of W-+/-gamma differential cross sections in proton-proton collisions at root s=13 TeV and effective field theory constraints
Oluşturanlar
- Tumasyan, A.1
- Adam, W.2
- Andrejkovic, J. W.2
- Bergauer, T.2
- Chatterjee, S.2
- Dragicevic, M.2
- Del Valle, A. Escalante2
- Fruhwirth, R.
- Jeitler, M.
- Krammer, N.2
- Lechner, L.2
- Liko, D.2
- Mikulec, I2
- Paulitsch, P.2
- Pitters, F. M.2
- Schieck, J.
- Schofbeck, R.2
- Spanring, M.2
- Templ, S.2
- Waltenberger, W.2
- Waltenberger, W.2
- 1. Yerevan Phys Inst, Yerevan, Armenia
- 2. Inst Hochenergiephys, Vienna, Austria
Açıklama
Differential cross section measurements of W(+/-)y production in proton-proton collisions at root s = 13 TeV are presented. The data set used in this study was collected with the CMS detector at the CERN LHC in 2016-2018 with an integrated luminosity of 138 fb(-1). Candidate events containing an electron or muon, a photon, and missing transverse momentum are selected. The measurements are compared with standard model predictions computed at next-to-leading and next-to-next-to-leading orders in perturbative quantum chromodynamics. Constraints on the presence of TeV-scale new physics affecting the WW gamma vertex are determined within an effective field theory framework, focusing on the O-3w operator. A simultaneous measurement of the photon transverse momentum and the azimuthal angle of the charged lepton in a special reference frame is performed. This two-dimensional approach provides up to a factor of ten more sensitivity to the interference between the standard model and the O-3w contribution than using the transverse momentum alone.
Dosyalar
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Dosyalar
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