Probing the Pomeron structure using dijets and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi><mml:mo>+</mml:mo><mml:mtext mathvariant="normal">jet</mml:mtext></mml:math>events at the LHC

Marquet, Cyrille; Royon, C.; Saimpert, M.; Werder, Dominik

doi:10.1103/physrevd.88.074029

Cited by 20 publications

(26 citation statements)

References 25 publications

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“…On the contrary, measuring the γ+jet to the dijet cross section ratios as a function of the diffractive mass M allows to distinguish between different assumptions on the quark content of the Pomeron [9]. For instance, varying d/u between 0.25 and 4 leads to a variation of the cross section ratio by a factor 2.5.…”

Section: Dijet Production In Double Pomeron Exchanges Processes and Smentioning

confidence: 99%

“…In order to quantify how well we are sensitive to the Pomeron structure in terms of gluon density at the LHC, we display in Fig. 8, the dijet mass fraction, the ratio of the dijet mass to the total diffractive mass [9,13,14]. The central black line displays the cross section value for the gluon density in the Pomeron measured at HERA including an additional survival probability of 0.03.…”

Section: Dijet Production In Double Pomeron Exchanges Processes and Smentioning

confidence: 99%

“…Medium luminosity measurements with the rapidity gap method used in Alice (two new scintillator hodoscopes covering −7.0 < η < −4.9 and 4.8 < η < 6.3 are being installed in Alice in order to improve the forward coverage) or with proton tagging in AFP and CMS-TOTEM allow constraining further the pomeron structure using γ+jet and dijet events [9]. The aim is to answer mainly the following questions that are fundamental from the QCD point of view:…”

Section: Inclusive Diffractive Measurementsmentioning

confidence: 99%

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Forward Physics at the LHC: from the Structure of the Pomeron to the Search for $\gamma $-induced Resonances

Royon¹

2016

Acta Phys. Pol. B

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We describe some of the future measurements to be performed by the CMS, TOTEM and ATLAS collaborations on hard diffraction in order to understand better the structure of the Pomeron. We also describe the prospects concerning the search for quartic γγγγ anomalous couplings and discuss a possible interpretation for the existence of a new particle decaying into two photons at a mass of about 750 GeV.In this short review, we will describe some potential measurements to be performed at the LHC mainly in the ATLAS, CMS-TOTEM, CT-PPS experiments in order to get a better understanding of diffraction and photonexchange processes. Of special interest will be the discussion of beyond standard model reaches especially in the di-photon channel that might be the firt sign of new physics. These studies follow a long term collaboration with Prof. Andrzej Bialas and Prof. Robert Peschanski that started after my PhD in Saclay about the dipole model and diffraction [1] and I would like to express all my gratitude to Andrezj for this long term and successful collaboration, and to wish him a very nice birthday for this occasion. Experimental definition of diffraction and measurement of the gluon density in the Pomeron at HERAIn this section, we discuss the different experimental ways to define diffraction. As an example, we describe the methods used by the H1 and ZEUS experiments at HERA, DESY, Hamburg in Germany since it is the starting point for any diffraction studies at the LHC (most of the quark and gluon densities in the Pomeron were obtained using HERA data). In addition, many results concerning diffraction have been obtained at the Tevatron and the LHC will allow to extend these measurements in a completely new kinematical domain.(1)

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Section: Dijet Production In Double Pomeron Exchanges Processes and Smentioning

confidence: 99%

Section: Dijet Production In Double Pomeron Exchanges Processes and Smentioning

confidence: 99%

Section: Inclusive Diffractive Measurementsmentioning

confidence: 99%

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Forward Physics at the LHC: from the Structure of the Pomeron to the Search for $\gamma $-induced Resonances

Royon¹

2016

Acta Phys. Pol. B

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“…This process provides important tests of perturbative QCD and is one of the most important backgrounds to new physics processes. These aspects have motivated the development of an extensive phenomenology for this process in the last years [6][7][8][9][10][11][12][13][14][15][16][17]. In particular, dijet production by photon-pomeron interactions in ultraperipheral pp/ p A/A A collisions, characterized by two intact hadrons and two rapidity gaps in the final state, has been recently investigated in Ref.…”

Section: Introductionmentioning

confidence: 99%

Photon and Pomeron-induced Production of Dijets in pp, pA and AA Collisions

et al. 2017

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In this paper we present a detailed comparison of the dijet production by photon-photon, photon-pomeron and pomeron-pomeron interactions in pp, p A and AA collisions at the LHC energy. The transverse momentum, pseudorapidity and angular dependencies of the cross sections are calculated at LHC energy using the Forward Physics Monte Carlo (FPMC), which allows one to obtain realistic predictions for the dijet production with two leading intact hadrons. We see that the γ IP channel is dominant at forward rapidities in pp collisions and in the full kinematical range in the nuclear collisions of heavy nuclei. Our results indicate that the analysis of dijet production at the LHC can be useful to test the resolved pomeron model as well as to constrain the magnitude of the absorption effects.

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“…They can originate from photon exchanges as well. The physics motivation is a better understanding of diffraction in terms of QCD [1] and the search for beyond standard model physics such as the existence of extra-dimensions in the universe via anomalous couplings between photons, W and Z bosons [2]. The intact protons scattered at small angles can be measured in dedicated detectors, hosted in roman pots, located close to the beam and far away from the main central ATLAS or CMS detectors.…”

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confidence: 99%