Diffractive production of two ρ0
                     L mesons in e+e- collisions

Segond, M.; Szymanowski, L.; Wallon, S.

doi:10.1140/epjc/s10052-007-0365-9

Cited by 32 publications

(26 citation statements)

References 39 publications

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“…On the experimental side, the future Electron-Ion Collider [97] and Large Hadron Electron Collider [98] with a high center-of-mass energy and high luminosities, as well as the International Linear Collider [99][100][101] will hopefully open the opportunity to study in more detail the hard diffractive production of mesons [91][92][93][102][103][104][105][106] …”

Section: Discussionmentioning

confidence: 99%

Saturation effects in exclusive ρ T,L meson electroproduction

Besse

Szymanowski

Wallon

2013

J. High Energ. Phys.

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We use recent results for the γ * L → ρ L and γ * T → ρ T impact factors, computed in the impact parameter representation within the collinear factorization scheme, to get predictions for the polarized cross-sections σ T and σ L of the diffractive leptoproduction of the ρ meson at high energy. In this approach the helicity amplitude is a convolution of the scattering amplitude of a color dipole with a target, together with the virtual gamma wave function and with the first moments of the ρ meson wave function (in the transverse momentum space), given by the distribution amplitudes up to twist 3 for the γ * T → ρ T impact factor and up to twist 2 for the γ * L → ρ L impact factor. Combining these results with recent dipole models fitted to DIS data, which include saturation effects, we show that the predictions are in good agreement with HERA data for photon virtuality (Q 2 ) larger than typically 5 GeV 2 , without free parameters and with a weak dependence on the choice of the factorization scale, i.e. the shape of the DAs, for both longitudinally and transversely polarized ρ meson. For lower values of Q 2 , the inclusion of saturation effects is not enough to provide a good description of HERA data. We believe that it is a signal of a need for higher twist contributions in the ρ meson DAs. We also analyze the radial distributions of dipoles between the initial γ * and the final ρ meson states.

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Section: Discussionmentioning

confidence: 99%

Saturation effects in exclusive ρ T,L meson electroproduction

Besse

Szymanowski

Wallon

2013

J. High Energ. Phys.

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“…The techniques developed in Refs. [33][34][35] cannot be applied here due to the very elaborated topology of the most complicated diagrams involved (square box with one additional diagonal line). Instead we rely on a numerical evaluation by Monte Carlo methods.…”

Section: Charge Asymmetries and Ratesmentioning

confidence: 99%

Hard Pomeron-odderon interference effects in the production ofπ+π−pairs in high energyγγcollisions at the LHC

et al. 2008

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We estimate the production of two meson pairs in high energy photon-photon collisions produced in ultraperipheral collisions at LHC. We show that the study of charge asymmetries may reveal the existence of the perturbative Odderon and discuss the concrete event rates expected at the LHC. Sizable rates and asymmetries are expected in the case of proton-proton collisions and medium values of energies ffiffiffiffiffiffiffi s p % 20 GeV. Proton-proton collisions will benefit from a high rate due to a large effective luminosity and ion-ion collisions with a somewhat lower rate from the possibility to trigger on ultraperipheral collisions and a reduced background from strong interactions.

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“…The description of double vector meson production in γ γ interactions at high energies has attracted the attention of several theoretical groups in the last years, with the cross section being estimated in different theoretical frameworks [60,61,[63][64][65][69][70][71][72][73][74][75][76][77][78][79][80], as, for instance, the solution of the BFKL equation and impact factors at leading and next-toleading orders. In particular, in Ref.…”

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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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Diffractive production of two ρ0 L mesons in e+e- collisions

Cited by 32 publications

References 39 publications

Saturation effects in exclusive ρ T,L meson electroproduction

Saturation effects in exclusive ρ T,L meson electroproduction

Hard Pomeron-odderon interference effects in the production ofπ+π−pairs in high energyγγcollisions at the LHC

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

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