Incoherent diffractive dijet production and gluon Bose enhancement in the nuclear wave function

Kar, Tiyasa; Kovner, Alexander; Li, Ming; Skokov, Vladimir V.

doi:10.1007/jhep07(2024)134

Cited by 3 publications

(1 citation statement)

References 67 publications

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“…Equally significant is the diffractive production of jets or hadrons [31,[44][45][46][47][48][49][50][51][52][53][54][55][56]. A process is considered diffractive, if there is no net color exchange between the projectile and the hadronic or nuclear target.…”

Section: Introductionmentioning

confidence: 99%

Incoherent diffractive dijet production in electron DIS off nuclei at high energy

2023

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We study incoherent diffractive production of two and three jets in electron-nucleus deep inelastic scattering (DIS) at small x Bj using the color dipole picture and the effective theory of the Color Glass Condensate (CGC). We consider color fluctuations in the CGC weightfunction as the source of the nuclear break-up and the associated momentum transfer |t|. We focus on the regime in which the two jets are almost back-to-back in transverse space and have transverse momenta P ⊥ much larger than both the momentum transfer and the saturation scale Q s . The cross section for producing such a hard dijet is parametrically dominated by large size fluctuations in the projectile wave-function that scatter strongly and for which a third, semi-hard, jet appears in the final state. The 2 + 1 jets cross section can be written in a factorized form in terms of incoherent quark and gluon diffractive transverse momentum distributions (DTMDs) when the third jet is explicit, or incoherent diffractive parton distribution functions (DPDFs) when the third jet is integrated over. We find that the DPDFs and the corresponding cross section saturate logarithmically when |t| ≪ Q 2 s , while they fall like 1/|t| 2 in the regime Q 2 s ≪ |t| ≪ P 2 ⊥ . We further show that there is no angular correlation between the hard jet momentum and the momentum transfer. For typical EIC kinematics the 2 jets and 2 + 1 jets cross sections are of the same order.

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Section: Introductionmentioning

confidence: 99%

Incoherent diffractive dijet production in electron DIS off nuclei at high energy

2023

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Incoherent diffractive production of jets in electron DIS off nuclei at high energy

Rodriguez-Aguilar,

Triantafyllopoulos,

Wei

2024

Phys. Rev. D

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We study incoherent diffractive production of two and three jets in electron-nucleus deep inelastic scattering (DIS) at small xBj using the color dipole picture and the effective theory of the color glass condensate (CGC). We consider color fluctuations in the CGC weight-function as the source of the nuclear break-up and the associated momentum transfer |t|. We focus on the regime in which the two jets are almost back-to-back in transverse space and have transverse momenta P⊥ much larger than both the momentum transfer and the saturation scale Qs. The cross section for producing such a hard dijet is parametrically dominated by large size fluctuations in the projectile wave-function that scatter strongly and for which a third, semihard, jet appears in the final state. The 2+1 jets cross section can be written in a factorized form in terms of incoherent quark and gluon diffractive transverse momentum distributions (DTMDs) when the third jet is explicit, or incoherent diffractive parton distribution functions (DPDFs) when the third jet is integrated over. We find that the DPDFs and the corresponding cross section saturate logarithmically when |t|≪Qs2, while they fall like 1/|t|2 in the regime Qs2≪|t|≪P⊥2. We further show that there is no angular correlation between the hard jet momentum and the momentum transfer. For typical EIC kinematics the 2 jets and 2+1 jets cross sections are of the same order. Published by the American Physical Society 2024

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Direct quarkonium production in DIS from a joint CGC and NRQCD framework

Cheung,

Kang,

Salazar

et al. 2024

Phys. Rev. D

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We compute the differential cross section for direct quarkonium production in high-energy electron-nucleus collisions at small x. Our computation is performed within the nonrelativistic QCD factorization formalism that separates the calculation into short distance coefficients and long distance matrix elements that depend on the color and spin of the state. We obtain the short distance coefficients of the production of the heavy quark pair within the framework of the color glass condensate effective field theory, which resums coherent multiple interactions of the heavy quark pair with the nucleus to all orders. Our results are expressed as the convolution of perturbatively calculable functions with multipoint lightlike Wilson line correlators. In the correlation limit, we establish the correspondence between our color glass condensate formulation with calculations employing the transverse momentum dependent (TMD) framework. We extend this correspondence by resumming kinematic power corrections within the improved TMD framework, which interpolates between the TMD formalism and k⊥-factorization formalism. We present a detailed numerical analysis, focusing on J/ψ production in the kinematics accessible at the future Electron-Ion Collider, highlighting the importance of genuine higher-order saturation contributions when the electron collides with a large nucleus. Our results are also valid in the photoproduction limit where we expect the largest contribution from genuine higher-order saturation contributions which could be accessed in ultraperipheral collisions of relativistic heavy ions. Published by the American Physical Society 2024

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Incoherent diffractive dijet production and gluon Bose enhancement in the nuclear wave function

Cited by 3 publications

References 67 publications

Incoherent diffractive dijet production in electron DIS off nuclei at high energy

Incoherent diffractive dijet production in electron DIS off nuclei at high energy

Incoherent diffractive production of jets in electron DIS off nuclei at high energy

Direct quarkonium production in DIS from a joint CGC and NRQCD framework

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