Evidence for exclusive γγ → W+ W− production and constraints on anomalous quartic gauge couplings in pp collisions at √s = 7 and 8 TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/104637

Title:	Evidence for exclusive γγ → W+ W− production and constraints on anomalous quartic gauge couplings in pp collisions at √s = 7 and 8 TeV
Authors:	余欣珊;Rahbaran, B.;Schieck, J.;Tavernier, S.;Brun, H.;Caillol, C.;Clerbaux, B.;Karapostoli, G.;Perniè, L.;Forthomme, L.;Popov, A.;Beliy, N.;Da Costa, E. M.;Tonelli Manganote, E. J.;Petkov, P.;Li, Q.;Florez, C.;Gomez, J. P.;Nicolaou, C.;Finger, M.;Strebler, T.;Ruiz Alvarez, J. D.;Radziej, M.;Nugent, I. M.;Asin, I.;Dooling, S.;Lobanov, A.;Colombo, F.;Mandal, K.;Sarkar, S.;Shukla, P.;Paktinat Mehdiabadi, S.;Abbrescia, M.;Radogna, R.;Ranieri, A.;Campanini, R.;Marcellini, S.;Giordano, F.;Sguazzoni, G.;Monge, M. R.;Gennai, S.;Gonella, F.;Pozzobon, N.;Ronchese, P.;Biino, C.;Cossutti, F.;Son, D. C.;Mohamad Idris, F.;Sanchez-Hernandez, A.;Bluj, M.;Skatchkov, N.;Dermenev, A.;Obraztsov, S.;Azhgirey, I.;Escalante Del Valle, A.;Fouz, M. C.;Gonzalez Caballero, I.;Castello, R.;Cepeda, M.;du Pree, T.;Duggan, D.;Gigi, D.;Kirschenmann, H.;Simon, M.;Musella, P.;Pandolfi, F.;Pauss, F.;Perrozzi, L.;Galloni, C.;Hreus, T.;Onengut, G.;Ball, F.;Dunne, P.;Pela, J.;Richards, A.;Uchida, K.;Funk, G.;Stuart, D.;Anderson, D.;Chaves, J.;Lykken, J.;Strobbe, N.;Yelton, J.;Adams, T.;Prosper, H.;Varelas, N.;Wu, Z.;Clarida, W.;Gandrajula, R. P.;Nachtman, J.;Fehling, D.;Baringer, P.;George, J.;Hahn, K. A.;Valls, N.;Woodard, A.;Hebda, P.;Garcia-Bellido, A.;Dragoiu, C.;Kunori, S.;Herndon, M.
Contributors:	理學院物理學系
Keywords:	Classical and Quantum Gravitation;Elementary Particles;Physics;Physics and Astronomy;Quantum Field Theories;Quantum Field Theory;Quantum Physics;Regular Article - Experimental Physics;Relativity Theory;String Theory
Date:	2016-08-01
Issue Date:	2026-04-23 11:54:22 (UTC+8)
Publisher:	Berlin/Heidelberg: Springer Berlin Heidelberg
Abstract:	摘要： A bstract A search for exclusive or quasi-exclusive γγ → W + W − production, via pp → p () W + W − p () → p () μ ± e ∓ p () at s = 8 TeV, is reported using data corresponding to an integrated luminosity of 19.7 fb −1 . Events are selected by requiring the presence of an electron-muon pair with large transverse momentum p T ( μ ± e ∓ ) > 30 GeV, and no associated charged particles detected from the same vertex. The 8 TeV results are combined with the previous 7 TeV results (obtained for 5.05 fb −1 of data). In the signal region, 13 (2) events are observed over an expected background of 3.9 ± 0.6 (0.84 ± 0.15) events for 8 (7) TeV, resulting in a combined excess of 3.4σ over the background-only hypothesis. The observed yields and kinematic distributions are compatible with the standard model prediction for exclusive and quasi-exclusive γγ → W + W − production. Upper limits on the anomalous quartic gauge coupling operators a 0, C W (dimension-6) and f M 0,1,2,3 (dimension-8), the most stringent to date, are derived from the measured dilepton transverse momentum spectrum. 其他題名： J. High Energ. Phys 出版者： Berlin/Heidelberg: Springer Berlin Heidelberg 出版日期： 2016-08-22 出處： The journal of high energy physics, 2016-08, Vol.2016 (8) 資源來源： Publicly available content database 版權： The Author(s) 2016 識別號： EISSN: 1029-8479 識別號： DOI: 10.1007/JHEP08(2016)119
Appears in Collections:	[Department of Physics] journal & Dissertation

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