Production of γγ+2 jets from double parton scattering in proton-proton collisions at the LHC

Tao, J.; Zhang, Si-Jing; Shen, Y.; Fan, Jing; Chen, Guo-Ming; Chen, He-Sheng

doi:10.1088/1674-1137/39/12/121001

Cited by 3 publications

(1 citation statement)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such a functionality is very useful to cross check and to specify a global K-factor from the missing higher-order quantum corrections. Some studies on the inclusive DPS production rates of this process at the Tevatron [112] and the LHC [113] have been explored in the literature.…”

Section: D4 Double Parton Scattering For Associated Production Of Dip...mentioning

confidence: 99%

HELAC-Onia 2.0: An upgraded matrix-element and event generator for heavy quarkonium physics

Shao

2016

Computer Physics Communications

136

102

View full text Add to dashboard Cite

We present an upgraded version (denoted as version 2.0) of the program HELAC-Onia for the automated computation of heavy-quarkonium helicity amplitudes within non-relativistic QCD framework. The new code has been designed to include many new and useful features for practical phenomenological simulations. It is designed for job submissions under cluster enviroment for parallel computations via Python scripts. We have interfaced HELACOnia to the parton shower Monte Carlo programs Pythia 8 and QEDPS to take into account the parton-shower effects. Moreover, the decay module guarantees that the program can perform the spin-entangled (cascade-)decay of heavy quarkonium after its generation. We have also implemented a reweighting method to automatically estimate the uncertainties from renormalization and/or factorization scales as well as parton-distribution functions to weighted or unweighted events. A futher update is the possiblity to generate one-dimensional or two-dimensional plots encoded in the analysis files on the fly. Some dedicated examples are given at the end of the writeup. Programming language:Python, Fortran 77, Fortran 90, C++ Keywords: heavy quarkonium, NRQCD, Monte Carlo simulation Nature of physical problem: Heavy quarkonium production processes provide an important way to investigate QCD in its poorly known non-perturbative regime. Its production mechanism has been attracted extensive interests from the high-energy physics community in decades. The qualitative and quantitative description of heavy-quarkonium production requires complex perturbative computations for high-multiplicity processes in the framework of the well established non-relativistic effecitive theory, NRQCD, and reliable Monte Carlo simulations to repreduce the collider enviroment. Method of solution:Based on a recursion relation, the program is able to calculate the helicity ampltiudes of the high-multiplicity heavy-qurkonium-production processes. Several modules are also designed for dedicated simulations: 1) The code has been interfaced with the parton shower Monte Carlo programs; 2) A decay module to let heavy quarkonia decay with correct spin-correlations has been implemented; 3) The code estimates the theoretical uncertainties and analyzes the generated events on the fly; 4) The code is compilant with multi-threading/multi-core usage or cluster processors.

show abstract

Section: D4 Double Parton Scattering For Associated Production Of Dip...mentioning

confidence: 99%

HELAC-Onia 2.0: An upgraded matrix-element and event generator for heavy quarkonium physics

Shao

2016

Computer Physics Communications

136

102

View full text Add to dashboard Cite

show abstract

Cancellation of Glauber gluon exchange in the double Drell-Yan process

Diehl

Gaunt

Ostermeier

et al. 2016

J. High Energ. Phys.

111

View full text Add to dashboard Cite

An essential part of any factorisation proof is the demonstration that the exchange of Glauber gluons cancels for the considered observable. We show this cancellation at all orders for double Drell-Yan production (the double parton scattering process in which a pair of electroweak gauge bosons is produced) both for the integrated cross section and for the cross section differential in the transverse boson momenta. In the process of constructing this proof, we also revisit and clarify some issues regarding the Glauber cancellation argument and its relation to the rest of the factorisation proof for the single Drell-Yan process.

show abstract

Probing impact-parameter dependent nuclear parton densities from double parton scatterings in heavy-ion collisions

Shao

2020

Phys. Rev. D

View full text Add to dashboard Cite

We propose a new method to determine the spatially or impact-parameter dependent nuclear parton distribution functions (nPDFs) using the double parton scattering (DPS) processes in highenergy heavy-ion (proton-nucleus and nucleus-nucleus) collisions. We derive a simple generic DPS formula in nuclear collisions by accommodating both the nuclear collision geometry and the spatially dependent nuclear modification effect, under the assumption that the impact-parameter dependence of nPDFs is only related to the nuclear thickness function. While the geometric effect is widely adopted, the impact of the spatially dependent nuclear modification on DPS cross sections has been overlooked so far, which can, however, be significant when the initial nuclear modification is large. In turn, the DPS cross sections in heavy-ion collisions can provide useful information on the spatial dependence of nPDFs. They can be, in general, obtained in minimum-bias nuclear collisions, featuring the virtue of independence of Glauber modeling.1 To the best of our knowledge, none of the existing DPS phenomenological applications in heavy-ion collisions [89][90][91][92][96][97][98][99][100][101][102][103][104] considers such an effect. 2 There are also a few attempts to obtain the spatial form of the nPDFs based on phenomenological models (see, e.g., ).

show abstract

Production of γγ+2 jets from double parton scattering in proton-proton collisions at the LHC

Abstract: Production of γγ+2 jets from double parton scattering in proton-proton collisions at the LHC * TAO Jun-Quan( ) 1;1) ZHANG Si-Jing( ) 1,2 SHEN Yu-Qiao( ) 1,2 FAN Jia-Wei( ) 1,2 CHEN Guo-Ming( ) 1 CHEN He-Sheng( ) 1

Cited by 3 publications

References 48 publications

HELAC-Onia 2.0: An upgraded matrix-element and event generator for heavy quarkonium physics

HELAC-Onia 2.0: An upgraded matrix-element and event generator for heavy quarkonium physics

Cancellation of Glauber gluon exchange in the double Drell-Yan process

Probing impact-parameter dependent nuclear parton densities from double parton scatterings in heavy-ion collisions

Contact Info

Product

Resources

About