Extra dimensions in γγ → γγ process at the CERN-LHC

Atağ, S.; İnan, S. C.; Şahin, İnanç

doi:10.1007/jhep09(2010)042

Cited by 41 publications

(26 citation statements)

References 37 publications

(22 reference statements)

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“…The exclusive production of pairs of muons and pairs of W bosons have been generated using the Herwig++ generator [8]. The exclusive production of pairs of photons has been generated using the FPMC generator [9] at large W γ γ where the γ γ → γ γ cross section is dominated by one-loop diagrams involving W bosons [10]. Finally, the exclusive production of the Higgs boson is computed according to higgs effective field theory (HEFT) [11].…”

Section: Introductionmentioning

confidence: 99%

The role of finite-size effects on the spectrum of equivalent photons in proton–proton collisions at the LHC

Dyndał¹,

Schoeffel²

2015

Physics Letters B

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When computing such cross sections, it has already been shown that finite size effects of colliding protons are important to consider for a realistic estimate of the cross sections. These first results have been essential in understanding the physics case of heavy-ion collisions in the low invariant mass range, where heavy ions collide to form an exclusive final state like a J /Ψ vector meson. In this paper, our purpose is to present some calculations that are valid also for the exclusive production of high masses final states in proton-proton collisions, like the production of a pair of W bosons or the Higgs boson. Therefore, we propose a complete treatment of the finite size effects of incident protons irrespective of the mass range explored in the collision. Our expectations are shown to be in very good agreement with existing experimental data obtained at the LHC.

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Section: Introductionmentioning

confidence: 99%

The role of finite-size effects on the spectrum of equivalent photons in proton–proton collisions at the LHC

Dyndał¹,

Schoeffel²

2015

Physics Letters B

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“…Previous studies using proton-tagging at the LHC for New Physics searches can be found in refs. [3,4,[9][10][11][12][13][14][15][16][17][18][19]. We refer to [20] for a study of light-by-light scattering at the LHC without proton tagging.…”

Section: Jhep02(2015)165 1 Introductionmentioning

confidence: 99%

Light-by-light scattering with intact protons at the LHC: from standard model to new physics

Fichet

Gersdorff

Lenzi

et al. 2015

J. High Energ. Phys.

121

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Abstract:We discuss the discovery potential of light-by-light scattering at the Large Hadron Collider (LHC), induced by the Standard Model (SM) and by new exotic charged particles. Our simulation relies on intact proton detection in the planned forward detectors of CMS and ATLAS. The full four-photon amplitudes generated by any electrically charged particles of spins 1/2 and 1, including the SM processes involving loops of leptons, quarks and W bosons are implemented in the Forward Physics Monte Carlo generator. Our method provides model-independent bounds on massive charged particles, only parametrized by the spin, mass and "effective charge" Q eff of the new particle. We find that a new charged vector (fermion) with Q eff = 4 can be discovered up to m = 700 GeV (m = 370 GeV) with an integrated luminosity of 300 fb −1 at the LHC. We also discuss the sensitivities to neutral particles such as a strongly-interacting heavy dilaton and warped Kaluza-Klein gravitons, whose effects could be discovered for masses in the multi-TeV range.

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“…Experimental results on exclusive twophoton production of W + W − and + − pairs in γ γ interactions reported by the CMS and ATLAS Collaborations [9][10][11][12] have demonstrated that it is possible to measure such events with the experimental apparatus already available at the LHC, allowing for novel studies of QCD at very high energies and searches for Beyond Standard Model Physics (see, e.g., Ref. [49][50][51][52][53][54][55][56][57][58][59]). This motivates us to revisit the analysis of double vector meson production in ultra peripheral heavy ion collisions performed some time ago in Refs.…”

mentioning

confidence: 99%

Double vector meson production in $$\gamma \gamma $$ γ γ interactions at hadronic colliders

2016

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In this paper we revisit the double vector meson production in γ γ interactions at heavy ion collisions and present, by the first time, predictions for the ρρ and J/ J/ production in proton-nucleus and proton-proton collisions. In order to obtain realistic predictions for rapidity distributions and total cross sections for the double vector production in ultra peripheral hadronic collisions we take into account the description of γ γ → V V cross section at low energies as well as its behavior at large energies, associated to the gluonic interaction between the color dipoles. Our results demonstrate that the double ρ production is dominated by the low energy behavior of the γ γ → V V cross section. In contrast, for the double J/ production, the contribution associated to the description of the QCD dynamics at high energies contributes significantly, mainly in pp collisions. Predictions for the RHIC, LHC, FCC, and CEPC-SPPC energies are shown.In recent years a series of experimental results from RHIC [1,2], Tevatron [3] and LHC [4][5][6][7][8][9][10][11][12] demonstrated that the study of photon-induced interactions in hadronic colliders is feasible and that it can be used to, among other things, improve our knowledge on the nuclear gluon distribution [13][14][15][16][17][18][19], on details of QCD dynamics [20][21][22][23][24][25][26][27][28][29][30], on the mechanism of quarkonium production [29][30][31][32][33][34][35][36], on the Odderon [37,38] and on the photon flux of the proton [39,40]. These data have stimulated the development of the theoretical description of these processes as well as the proposal of new forward detectors to be installed in the LHC [41,42].The basic idea in the photon-induced processes is that an ultra relativistic charged hadron (proton or nucleus) creates strong electromagnetic fields. A photon stemming from the electromagnetic field of one of the two colliding hadrons can interact with one photon coming from the other hadron a e-mails: barros@ufpel.edu.br;victor.goncalves@thep.lu.se (photon-photon process) or it can interact directly with the other hadron (photon-hadron process) [43][44][45][46][47][48]. In these processes the total cross section can be factorized in terms of the flux of equivalent photons from the hadron projectile and the photon-photon or photon-target production cross section. In this paper we will focus on two-photon interactions in hadronic collisions. Experimental results on exclusive twophoton production of W + W − and + − pairs in γ γ interactions reported by the CMS and ATLAS Collaborations [9][10][11][12] have demonstrated that it is possible to measure such events with the experimental apparatus already available at the LHC, allowing for novel studies of QCD at very high energies and searches for Beyond Standard Model Physics (see, e.g., Ref. [49][50][51][52][53][54][55][56][57][58][59]). This motivates us to revisit the analysis of double vector meson production in ultra peripheral heavy ion collisions performed some time ago in Refs. [60][61][62...

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Extra dimensions in γγ → γγ process at the CERN-LHC

Cited by 41 publications

References 37 publications

The role of finite-size effects on the spectrum of equivalent photons in proton–proton collisions at the LHC

The role of finite-size effects on the spectrum of equivalent photons in proton–proton collisions at the LHC

Light-by-light scattering with intact protons at the LHC: from standard model to new physics

Double vector meson production in $$\gamma \gamma $$ γ γ interactions at hadronic colliders

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