A full next-to-leading order study of direct photon pair production in hadronic collisions

Binoth, T.; Guillet, J. Ph.; Pilon, E.; Werlen, M.

doi:10.1007/s100520050024

Cited by 257 publications

(357 citation statements)

References 40 publications

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“…A combination of the leading-order (LO) event generator PYTHIA [17] and the next-to-leading-order (NLO) partonlevel simulation DIPHOX [18] is used to simulate the irreducible background. Monte Carlo samples are generated using PYTHIA 8.163 with the CTEQ6L1 [19] parton distribution functions (PDFs) and the AU2 PYTHIA parameter tune [20].…”

Section: Background Estimatementioning

confidence: 99%

Search for high-mass diphoton resonances inppcollisions ats=8 TeVwith the ATLAS detector

Aad¹,

Abbott²,

Abdallah³

et al. 2015

Phys. Rev. D

116

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This article describes a search for high-mass resonances decaying to a pair of photons using a sample of 20.3 fb −1 of pp collisions at ffiffi ffi s p ¼ 8 TeV recorded with the ATLAS detector at the Large Hadron Collider.The data are found to be in agreement with the Standard Model prediction, and limits are reported in the framework of the Randall-Sundrum model. This theory leads to the prediction of graviton states, the lightest of which could be observed at the Large Hadron Collider. A lower limit of 2.66 (1.41) TeV at 95% confidence level is set on the mass of the lightest graviton for couplings of k=M Pl ¼ 0.1 (0.01).

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Section: Background Estimatementioning

confidence: 99%

Search for high-mass diphoton resonances inppcollisions ats=8 TeVwith the ATLAS detector

Aad¹,

Abbott²,

Abdallah³

et al. 2015

Phys. Rev. D

116

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show abstract

“…The diphoton processes, however, suffers from several disadvantages: the total rate is only known at NLO [22], with an estimated error of about 20-30%. A normalization of the invariant mass distribution in the small M γγ region might suffer from soft-photon radiation on the one hand, and its extrapolation is affected by large logarithms on the other hand.…”

Section: Tree-level Virtual Graviton Exchangementioning

confidence: 99%

Graviton collider effects in one and more large extra dimensions

Giudice¹,

Plehn²,

Струмиа³

2005

Nuclear Physics B

166

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Astrophysical bounds severely limit the possibility of observing collider signals of gravity with less than 3 flat extra dimensions. However, small distortions of the compactified space can lift the masses of the lightest graviton excitations, evading astrophysical bounds without affecting collider signals of quantum gravity. Following this procedure we reconsider theories with one large extra dimension. A slight space warping gives a model which is safe in the infrared against astrophysical and observational bounds, and which has the ultraviolet properties of gravity with a single flat extra dimension. We extend collider studies to the case of one extra dimension, pointing out its peculiarities. Finally, for a generic number of extra dimensions, we compare different channels in LHC searches for quantum gravity, introducing an ultraviolet cutoff as an additional parameter besides the Planck mass.

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“…We remind the reader that at least one additional parton is needed in order to have q T = 0 for the diphoton pair. The q T spectrun of the diphoton pair has been calculated in fully-differential Monte Carlo codes at LO [13][14][15][16] and at NLO [23][24][25]. Recently, first calculations for diphoton production in association with two [26][27][28] and three [28] jets at NLO became available.…”

Section: Jhep06(2015)185mentioning

confidence: 99%

“…The QCD corrections at the first order in the strong coupling α S involve quark annihilation and a new partonic channel, via the subprocess qg → γγq. First order corrections have been computed and implemented in several fully-differential Monte Carlo codes [13][14][15][16]. At the second order in the strong coupling α S the gg channel starts to contribute, and the large gluon-gluon luminosity makes this channel potentially sizeable.…”

Section: Introductionmentioning

confidence: 99%

Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy

Cieri

Coradeschi

Florian

2015

J. High Energ. Phys.

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Abstract:We consider the transverse-momentum (q T ) distribution of a diphoton pair produced in hadron collisions. At small values of q T , we resum the logarithmically-enhanced perturbative QCD contributions up to next-to-next-to-leading logarithmic accuracy. At intermediate and large values of q T , we consistently combine resummation with the known next-to-leading order perturbative result. All perturbative terms up to order α 2 S are included in our computation which, after integration over q T , reproduces the known nextto-next-to-leading order result for the diphoton pair production total cross section. We present a comparison with LHC data and an estimate of the perturbative accuracy of the theoretical calculation by performing the corresponding variation of scales. In general we observe that the effect of the resummation is not only to recover the predictivity of the calculation at small transverse momentum, but also to improve substantially the agreement with the experimental data.

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A full next-to-leading order study of direct photon pair production in hadronic collisions

Cited by 257 publications

References 40 publications

Search for high-mass diphoton resonances inppcollisions ats=8 TeVwith the ATLAS detector

Search for high-mass diphoton resonances inppcollisions ats=8 TeVwith the ATLAS detector

Graviton collider effects in one and more large extra dimensions

Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy

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