Measurement of exclusive $\gamma\gamma\rightarrow W^+W^-$ production and search for exclusive Higgs boson production in $pp$ collisions at $\sqrt{s} = 8$ TeV using the ATLAS detector

M. Aaboud S. Albrand 1 S. Berlendis 1 A. Bethani 1 C. Camincher 1 J. Collot 1 S. Crépé-Renaudin 1 P.A. Delsart 1 C. Gabaldon 1 M.H. Genest 1 P.O.J. Gradin 1 J.Y. Hostachy 1 F. Ledroit-Guillon 1 A. Lleres 1 A. Lucotte 1 F. Malek 1 E. Petit 1 J. Stark 1 B. Trocmé 1 M. Wu 1 G. Rahal 2 Z. Barnovska 3 N. Berger 3 M. Delmastro 3 L. Di Ciaccio 3 S. Elles 3 K. Grevtsov 3 T. Guillemin 3 T. Hryn’ova 3 S. Jézéquel 3 I. Koletsou 3 R. Lafaye 3 J. Levêque 3 P. Mastrandea 3 G. Sauvage 3 E. Sauvan 3 B.H. Smart 3 T. Todorov 3 I. Wingerter-Seez 3 E. Yatsenko 3 D. Boumediene 4 E. Busato 4 D. Calvet 4 S. Calvet 4 A.R. Chomont 4 J. Donini 4 Ph. Gris 4 R. Madar 4 D. Pallin 4 S.M. Romano Saez 4 C. Santoni 4 D. Simon 4 F. Vazeille 4 G. Aad 5 M. Alstaty 5 M. Barbero 5 A. Calandri 5 T.P. Calvet 5 Y. Coadou 5 C. Diaconu 5 S. Diglio 5 F. Djama 5 V. Ellajosyula 5 L. Feligioni 5 J. Gao 5 A. Hadef 5 G.D. Hallewell 5 F. Hubaut 5 S.J. Kahn 5 E. B. F. G. Knoops 5 E. Le Guirriec 5 J. Liu 5 K. Liu 5 D. Madaffari 5 E. Monnier 5 S. Muanza 5 E. Nagy 5 P. Pralavorio 5 Y. Rodina 5 A. Rozanov 5 M. Talby 5 T. Theveneaux-Pelzer 5 R.E. Ticse Torres 5 S. Tisserant 5 J. Toth 5 F. Touchard 5 L. Vacavant 5 Chen Wang 5
Abstract : Searches for exclusively produced $W$ boson pairs in the process $pp(\gamma\gamma) \rightarrow pW^+W^-p$ and exclusively produced Higgs boson in the process $pp(gg) \rightarrow pHp$ have been performed using $e^{\pm}\mu^{\mp}$ final states. These measurements use 20.2 fb$^{-1}$ of $pp$ collisions collected by the ATLAS experiment at a center-of-mass energy $\sqrt{s}=8$ TeV at the LHC. Exclusive production of $W^+W^-$ consistent with the Standard Model prediction is found with 3.0$\sigma$ significance. The exclusive $W^+W^-$ production cross-section is determined to be $\sigma (\gamma\gamma\rightarrow W^{+}W^{-}\rightarrow e^{\pm}\mu^{\mp} X) = 6.9 \pm 2.2 (\mathrm{stat.}) \pm 1.4 (\mathrm{sys.})$ fb, in agreement with the Standard Model prediction. Limits on anomalous quartic gauge couplings are set at 95\% confidence-level as $-1.7 \times 10^{-6} < a_0^W/\Lambda^2 < 1.7 \times 10^{-6}$ GeV$^{-2}$and $-6.4 \times 10^{-6} < a_C^W/\Lambda^2 < 6.3 \times 10^{-6}$ GeV$^{-2}$. A 95\% confidence-level upper limit on the total production cross-section for exclusive Higgs boson is set to 1.2 pb.
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Article dans une revue
Physical Review D, American Physical Society, 2016, 94, pp.032011 〈10.1103/PhysRevD.94.032011〉
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Soumis le : lundi 18 juillet 2016 - 08:47:49
Dernière modification le : jeudi 18 janvier 2018 - 01:50:37

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M. Aaboud, S. Albrand, S. Berlendis, A. Bethani, C. Camincher, et al.. Measurement of exclusive $\gamma\gamma\rightarrow W^+W^-$ production and search for exclusive Higgs boson production in $pp$ collisions at $\sqrt{s} = 8$ TeV using the ATLAS detector. Physical Review D, American Physical Society, 2016, 94, pp.032011 〈10.1103/PhysRevD.94.032011〉. 〈in2p3-01345965〉

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