Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

M. Aaboud N. Berger 1 A.M. Burger 1 M. Delmastro 1 L. Di Ciaccio 1 S. Elles 1 K. Grevtsov 1 T. Guillemin 1 T. Hryn’ova 1 S. Jézéquel 1 O. Kivernyk 1 I. Koletsou 1 R. Lafaye 1 Jérémy Lévêque 1 N. Lorenzo Martinez 1 P. Mastrandea 1 S. Raspopov 1 E. Sauvan 1 B.H. Smart 1 S. Todorova-Nova 1 A. Vallier 1 I. Wingerter-Seez 1 E. Yatsenko 1 S. Berlendis 2 C. Camincher 2 J. Collot 2 S. Crépé-Renaudin 2 P.A. Delsart 2 C. Gabaldon 2 M.H. Genest 2 J.Y. Hostachy 2 F. Ledroit-Guillon 2 A. Lleres 2 A. Lucotte 2 F. Malek 2 T. Meideck 2 E. Petit 2 N.P. Readioff 2 J. Stark 2 B. Trocmé 2 G. Aad 3 M. Alstaty 3 M. Barbero 3 A. Calandri 3 T.P. Calvet 3 Y. Coadou 3 K. de Vasconcelos Corga 3 C. Diaconu 3 F. Djama 3 R. El Kosseifi 3 V. Ellajosyula 3 L. Feligioni 3 A. Hadef 3 G.D. Hallewell 3 F. Hubaut 3 S.J. Kahn 3 E. B. F. G. Knoops 3 R. Kukla 3 E. Le Guirriec 3 K. Liu 3 D. Madaffari 3 E. Monnier 3 S. Muanza 3 E. Nagy 3 P. Pralavorio 3 Y. Rodina 3 A. Rozanov 3 M. Talby 3 T. Theveneaux-Pelzer 3 R.E. Ticse Torres 3 S. Tisserant 3 J. Toth 4, 3 F. Touchard 3 L. Vacavant 3 R. Wolff 3
1 LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules - Laboratoire d'Annecy de Physique des Particules
2 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
3 CPPM - Centre de Physique des Particules de Marseille
4 Wigner Research Centre for Physics [Budapest]
Abstract : A measurement of the production cross section for two isolated photons in proton--proton collisions at a center-of-mass energy of $\sqrt{s}=8$ TeV is presented. The results are based on an integrated luminosity of 20.2 fb$^{-1}$ recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying $|\eta^{\gamma}|<1.37$ or ${1.56<|\eta^{\gamma}|<2.37}$ and transverse energies of respectively $E_{\mathrm{T,1}}^{\gamma}>40$ GeV and $E_{\mathrm{T,2}}^{\gamma}>30$ GeV for the two leading photons ordered in transverse energy produced in the interaction.The background due to hadronic jets and electrons is subtracted using data-driven techniques. The fiducial cross sections are corrected for detector effects and measured differentially as a function of six kinematic observables. The measured cross section integrated within the fiducial volume is $16.8 \pm 0.8$ pb. The data are compared to fixed-order QCD calculations at next-to-leading-order and next-to-next-to-leading-order accuracy as well as next-to-leading-order computations including resummation of initial-state gluon radiation at next-to-next-to-leading logarithm or matched to a parton shower, with relative uncertainties varying from 5% to 20%.
Document type :
Journal articles
Complete list of metadatas
http://hal.in2p3.fr/in2p3-01507438
Contributor : Claudine Bombar <>
Submitted on : Thursday, April 13, 2017 - 10:47:04 AM
Last modification on : Tuesday, November 5, 2019 - 4:32:43 PM

Links full text

arxiv

Identifiers

Collections

IN2P3 | LAPP | UNIV-SAVOIE | UGA | LPSC | UNIV-AMU | CPPM

Citation

M. Aaboud, N. Berger, A.M. Burger, M. Delmastro, L. Di Ciaccio, et al.. Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at $\sqrt{s}=8$ TeV with the ATLAS detector. Physical Review D, American Physical Society, 2017, 95, pp.112005. ⟨10.1103/PhysRevD.95.112005⟩. ⟨in2p3-01507438⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

354

Contact

CCSD