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The associated production of a J/psi and a photon in photon-hadron collisions is considered, and shown to be a good probe of the presence of colour-octet mediated channels in quarkonia production, as predicted by the factorization approach…

High Energy Physics - Phenomenology · Physics 2009-04-13 Matteo Cacciari , Mario Greco , Michael Krämer

We study the azimuthal angular decorrelation of the dijet production via photon fusion in ultra-peripheral heavy ion collisions. The impact parameter dependent cross section of quark-antiquark pairs production is derived using the…

High Energy Physics - Phenomenology · Physics 2023-02-03 Cheng Zhang , Qian-Shun Dai , Ding Yu Shao

In this paper we analyze azimuthal asymmetries in the processes of unpolarized and polarized $J/\psi \,(\Upsilon)$ production at an Electron-Ion Collider. Apart from giving access to various unknown gluon transverse momentum distributions,…

High Energy Physics - Phenomenology · Physics 2019-09-26 Alessandro Bacchetta , Daniël Boer , Cristian Pisano , Pieter Taels

The transverse momentum distributions for inclusive $\eta_{c,b}$ meson described by gluon-gluon interactions from photoproduction processes in relativistic heavy ion collisions are calculated. We considered the color singlet (CS) and color…

High Energy Physics - Phenomenology · Physics 2018-01-04 Gong-Ming Yu , Gao-Gao Zhao , Zhen Bai , Yan-Bing Cai , Hai-Tao Yang , Jian-Song Wang

We compute the differential cross-section for inclusive prompt photon$+$quark production in deeply inelastic scattering of electrons off nuclei at small $x$ ($e+A$ DIS) in the framework of the Color Glass Condensate effective field theory.…

High Energy Physics - Phenomenology · Physics 2021-01-18 Isobel Kolbé , Kaushik Roy , Farid Salazar , Bjoern Schenke , Raju Venugopalan

In this paper, we study the production of isolated-photon plus a jet in $pp$ and $PbPb$ collisions, which can be used as an important probe to the jet transport property in quark gluon plasma created in heavy ion collisions. Normally, there…

High Energy Physics - Phenomenology · Physics 2018-08-01 Lin Chen , Guang-You Qin , Lei Wang , Shu-Yi Wei , Bo-Wen Xiao , Han-Zhong Zhang , Ya-Qi Zhang

We investigate the azimuthal asymmetries such as $\cos2{\phi_T}$ and Sivers symmetry for $J/\psi$ and $\pi^\pm$ production in electron-proton scattering, focusing on scenarios where the $J/\psi$ and the pion are produced in an almost…

High Energy Physics - Phenomenology · Physics 2024-08-13 Khatiza Banu , Asmita Mukherjee , Amol Pawar , Sangem Rajesh

Angular correlation of jets produced in association with a massive scalar, vector or tensor boson is crucial in the determination of their spin and CP properties. We study jet angular correlations in events with a high mass bottom quark…

High Energy Physics - Phenomenology · Physics 2013-05-08 Kaoru Hagiwara , Satyanarayan Mukhopadhyay

The prediction of single-spin asymmetry in inelastic photoproduction of $J/\psi$ in $ep^\uparrow$ collision is presented. At next-to-leading order, the dominating process is photon-gluon fusion, $\gamma+g\rightarrow J/\psi+g$ for the…

High Energy Physics - Phenomenology · Physics 2018-07-11 Sangem Rajesh , Raj Kishore , Asmita Mukherjee

We study the azimuthal asymmetries in back-to-back leptoproduction of $D$-meson and jet to probe the gluon TMDs in an unpolarized and transversely polarized electron-proton collision at the kinematics of EIC. We give predictions for…

High Energy Physics - Phenomenology · Physics 2023-08-16 Khatiza Banu , Asmita Mukherjee , Amol Pawar , Sangem Rajesh

We study the tomographic applications of a new phenomenon we dub "jet drift" -- the deflection of high-energy particles and jets toward the direction of a flowing medium -- to the quark-gluon plasma produced in heavy-ion collisions. While…

High Energy Physics - Phenomenology · Physics 2022-04-06 Logan Antiporda , Joseph Bahder , Hasan Rahman , Matthew D. Sievert

We calculate the yields of quarkonia in heavy ion collisions at RHIC and the LHC as a function of their transverse momentum. Based upon non-relativistic quantum chromodynamics, our results include both color-singlet and color-octet…

High Energy Physics - Phenomenology · Physics 2013-04-18 Rishi Sharma , Ivan Vitev

Quark-antiquark pair (or dijet) production at the electron-ion collider (EIC) has been argued to be one of most important processes that allowing to access the Weizs\"acker-Williams (WW) gluon distributions at small $x$ limit. Within the…

High Energy Physics - Phenomenology · Physics 2022-01-05 Ye-Yin Zhao , Ming-Mei Xu , Li-Zhu Chen , Dong-Hai Zhang , Yuan-Fang Wu

We study the polar and azimuthal decay angular distributions of $J/\psi$ mesons produced in semi-inclusive, deep-inelastic electron-proton scattering. For the description of the quarkonium formation mechanism, we adopt the framework of…

High Energy Physics - Phenomenology · Physics 2022-03-23 Umberto D'Alesio , Luca Maxia , Francesco Murgia , Cristian Pisano , Sangem Rajesh

We study the production, in Deep Inelastic Scattering at high energy, of a quark-gluon dijet induced by $t$-channel quark exchange with the target, which goes beyond the eikonal approximation. Throughout this study we follow the Color Glass…

High Energy Physics - Phenomenology · Physics 2023-10-06 Tolga Altinoluk , Nestor Armesto , Guillaume Beuf

We study the photoproduction of the heavy quarkonium at the future International Linear Collider (ILC) within the nonrelativistic QCD theory. We focus on the production channel via the subprocess $\gamma\gamma \to |[Q\bar{Q'}]_{\bf…

High Energy Physics - Phenomenology · Physics 2014-10-30 Gu Chen , Xing-Gang Wu , Hai-Bing Fu , Hua-Yong Han , Zhan Sun

I present an overview of some of the recent results on jets and jet-like correlation measurements from the Relativistic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory. Jets are produced in the initial hard scatterings of an…

Nuclear Experiment · Physics 2011-10-11 Helen Caines

We present a systematical study on the prompt $J/\psi$ production in association with a $c\bar{c}$ pair via the process, $\gamma\gamma \to H(c\bar{c}) +c+\bar{c}$, within the framework of non-relativistic QCD at the future high-energy…

High Energy Physics - Phenomenology · Physics 2015-10-19 Zhan Sun , Xing-Gang Wu , Hong-Fei Zhang

Two-dimensional angular correlation data from the STAR experiment at RHIC and from the LHC experiments provide critical information about dynamical processes in relativistic heavy-ion collisions. The principal correlation structures of…

High Energy Physics - Phenomenology · Physics 2014-07-16 R. L. Ray

A sizable $\cos 4\phi$ azimuthal asymmetry in exclusive di-pion production near $\rho^0$ resonance peak in ultraperipheral heavy ion collisions recently has been reported by STAR collaboration. We show that both elliptic gluon Wigner…

High Energy Physics - Phenomenology · Physics 2022-02-16 Yoshikazu Hagiwara , Cheng Zhang , Jian Zhou , Ya-jin Zhou