Forward trijet production in p-p and p-Pb collisions at LHC

Abstract

We calculate various azimuthal angle distributions for three jets produced in the forward rapidity region with transverse momenta $p_T>20\mathrm{GeV}$ in proton-proton (p-p) and proton-lead (p-Pb) collisions at center of mass energy $5.02\mathrm{TeV}$. We use the multi-parton extension of the so-called small-$x$ Improved Transverse Momentum Dependent factorization (ITMD). We study effects related to change from the standard $k_T$-factorization to ITMD factorization as well as changes as one goes from p-p collision to p-Pb. We observe rather large differences in the distribution when we change the factorization approach, which allows to both improve the small-$x$ TMD gluon distributions as well as validate and improve the factorization approach. We also see significant depletion of the nuclear modification ratio, indicating a possibility of searches for saturation effects using trijet final states in a more exclusive way than for dijets.

arXiv commentReferences added. To appear in JHEP

References in corpus (47)

• New parton distributions for collider physics
• Operator expansion for high-energy scattering
• LHAPDF6: parton density access in the LHC precision era
• Small-x F_2 Structure Function of a Nucleus Including Multiple Pomeron Exchanges
• Nonlinear Gluon Evolution in the Color Glass Condensate: I
• The Color Glass Condensate
• The Wilson renormalization group for low x physics: towards the high density regime
• The BFKL Equation from the Wilson Renormalization Group
• Nonlinear Gluon Evolution in the Color Glass Condensate: II
• Multi-Parton Amplitudes in Gauge Theories
• Unitarity at small Bjorken x
• The Wilson renormalization group for low x physics: Gluon evolution at finite parton density
• Relating different approaches to nonlinear QCD evolution at finite gluon density
• Universality of Unintegrated Gluon Distributions at small x
• New Color Decompositions for Gauge Amplitudes at Tree and Loop Level
• The Color Glass Condensate and hadron production in the forward region
• A unified BFKL and GLAP description of $F_2$ data
• The Construction of Gauge-Links in Arbitrary Hard Processes
• Feynman rules for effective Regge action
• Color-flow decomposition of QCD amplitudes
• Vector potential versus colour charge density in low-x evolution
• Improved TMD factorization for forward dijet production in dilute-dense hadronic collisions
• Gluon saturation in dijet production in p-Pb collisions at Large Hadron Collider
• Collinear and TMD parton densities from fits to precision DIS measurements in the parton branching method
• Forward di-jet production in p+Pb collisions in the small-x improved TMD factorization framework
• Forward Jet Production at the Large Hadron Collider
• Screening effects in the ultrahigh energy neutrino interactions
• Transverse-momentum-dependent gluon distributions from JIMWLK evolution
• Helicity amplitudes for high-energy scattering
• Gluon TMD in particle production from low to moderate x
• Linearly-polarized small-x gluons in forward heavy-quark pair production
• Collinear and TMD Quark and Gluon Densities from Parton Branching Solution of QCD Evolution Equations
• Multi-gluon helicity amplitudes with one off-shell leg within high energy factorization
• BFKL Azimuthal Imprints in Inclusive Three-jet Production at 7 and 13 TeV
• Multi-parton Cross Sections at Hadron Colliders
• Interplay of the CGC and TMD frameworks to all orders in kinematic twist
• Estimating nonlinear effects in forward dijet production in ultra-peripheral heavy ion collisions at the LHC
• Low $x$ physics as an infinite twist (G)TMD framework: unravelling the origins of saturation
• Wilson lines and gauge invariant off-shell amplitudes
• Non-eikonal corrections to multi-particle production in the Color Glass Condensate
• Calculations with off-shell matrix elements, TMD parton densities and TMD parton showers
• Forward trijet production in proton-nucleus collisions
• TMD factorization for dijets + photon production from the dilute-dense CGC framework
• TMD gluon distributions for multiparton processes
• Trijets in kt-factorisation: matrix elements vs parton shower
• HELAC-PHEGAS: automatic computation of helicity amplitudes and cross sections
• Three jet production and gluon saturation effects in p-p and p-Pb collisions within high-energy factorization

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• Quark TMDs from back-to-back dijet production at forward rapidities in pA collisions beyond eikonal accuracy in the CGC