DPS in CGC: HBT correlations in double inclusive photon production
arXiv:1701.00494 · doi:10.1103/PhysRevD.95.114028
Abstract
We introduce a technique to study double parton scattering (DPS) in the Color-Glass-Condensate (CGC) approach. We show that the cross-section of the DPS in the CGC approach is calculable in terms of new nonperturbative objects, generalized double transverse momentum-dependent parton distribution (2GTMD) functions. We investigate the production of pairs of prompt photons from two partons in the projectile hadron in high-energy proton-nucleus collisions. We show that even for independent partons in the projectile, the prompt photon correlation function exhibits Hanbury Brown and Twiss (HBT) correlations. The width of the HBT peak is controlled by the transverse distance between the parton of the pair, which is of the order of the proton size. Thus, the HBT measurements in two-particle production such as prompt photon pairs provide useful information about the nonperturbative 2GTMDs.
14 pages, 3 figures; v2: results unchanged, notation clarified and corrected, references added. The version to appear in PRD
References in corpus (32)
- Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
- Event-by-event gluon multiplicity, energy density and eccentricities at RHIC and LHC
- The ridge in proton-proton collisions at the LHC
- Generalized parton correlation functions for a spin-1/2 hadron
- Analysis of combined HERA data in the Impact-Parameter dependent Saturation model
- Forward inclusive dijet production and azimuthal correlations in pA collisions
- Multi-particle azimuthal correlations in p-Pb and Pb-Pb collisions at the CERN Large Hadron Collider
- Azimuthal correlations of forward di-hadrons in d+Au collisions at RHIC in the Color Glass Condensate
- CGC predictions for p+Pb collisions at the LHC
- Long Range Correlations and the Soft Ridge in Relativistic Nuclear Collisions
- The four jet production at LHC and Tevatron in QCD
- Angular Correlations in Gluon Production at High Energy
- Generalized parton correlation functions for a spin-0 hadron
- Forward dihadron correlations in deuteron-gold collisions with a Gaussian approximation of JIMWLK
- Unified framework for generalized and transverse-momentum dependent parton distributions within a 3Q light-cone picture of the nucleon
- CGC predictions for p+A collisions at the LHC and signature of QCD saturation
- Gluon saturation and inclusive hadron production at LHC
- Prompt photon production and photon-hadron correlations at RHIC and the LHC from the Color Glass Condensate
- Hadron multiplicity in pp and AA collisions at LHC from the Color Glass Condensate
- Gluon saturation and energy dependence of hadron multiplicity in pp and AA collisions at the LHC
- Azimuthal anisotropy of direct photons
- A systematic study of direct photon production in heavy ion collisions
- Same-sign WW production in proton-nucleus collisions at the LHC as a signal for double parton scattering
- Evidences for two scales in hadrons
- Probing the small- nuclear gluon distributions with isolated photons at forward rapidities in p+Pb collisions at the LHC
- Semi-inclusive photon-hadron production in pp and pA collisions at RHIC and LHC
- Drell-Yan Lepton-Pair-Jet Correlation in pA collisions
- Azimuthal Asymmetry of Prompt Photons in Nuclear Collisions
- Hadron production at the LHC: Any indication of new phenomena
- Diphoton production in high-energy p+A collisions
- Perturbative QCD and beyond: azimuthal angle correlations in deuteron-deuteron scattering from Bose-Einstein correlations
- CGC/saturation approach for high energy soft interactions: `soft' Pomeron structure and in hadron and nucleus collisions from Bose-Einstein correlation
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- Spinor helicity methods in high-energy factorization: efficient momentum-space calculations in the Color Glass Condensate formalism
- DPS in CGC: Double Quark Production and Effects of Quantum Statistics
- Multi Quark Production in p+A collisions: Quantum Interference Effects
- Directed flow from C-odd gluon correlations at small
- Correlations and the ridge in the Color Glass Condensate beyond the glasma graph approximation
- Bose enhancement, the Liouville effective action and the high multiplicity tail in p-A collisions
- Multiparticle Production at Mid-Rapidity in the Color-Glass Condensate
- What does the matter created in high multiplicity proton-nucleus collisions teach us about the 3-D structure of the proton?