Transverse momentum balance and angular distribution of 
					
	    
	    
	   dijets in Pb + Pb collisions *

Dai, Wei; Wang, Sa; Zhang, Shan-Liang; Zhang, Ben-Wei; Wang, Enke

doi:10.1088/1674-1137/abab8f

Cited by 20 publications

(23 citation statements)

References 77 publications

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“…To implement the in-medium parton evolution for light partons and heavy quarks simultaneously, we use the p+p events generated by SHERPA [62] with vacuum parton shower as input, and then investigate the subsequent inmedium jet evolution in the hot and dense QCD matter with the model of Simulating Heavy quark Energy Loss with Langevin equations (SHELL) [60,61,74,75] .…”

Section: Shell Model: In-medium Jet Evolutionmentioning

confidence: 99%

“…In the infinity heavy quarks limit (p ∼ T , M T ), the propagations of heavy quarks in the QGP are usually well described by the Langevin equations. When it goes to higher p T region, as the medium-induced gluon radiation become the dominant mechanism for the heavy quark energy loss, the modified Langevin equations [34,60,61,74,75] are viewed as a effective method to take into account the radiative correction, as shown in Eq. 2,…”

Section: Shell Model: In-medium Jet Evolutionmentioning

confidence: 99%

“…The SHELL model has been applied in the studies of medium modification of p T imbalance of bb dijets [60], correlations of Z 0 +b-jet [75]. Recently it has also been successfully employed to calculate the angular correlations of D 0 +jet in p+p and Pb+Pb collisions at √ s N N = 5.02 TeV [61,74], and a decent agreement between the model calculations and the experiment measurement has been observed [54].…”

Section: Shell Model: In-medium Jet Evolutionmentioning

confidence: 99%

“…The recent measurements relating to the production and substructure of heavy flavor jets shed new light on the jet physics in high-energy heavy-ion collisions [52][53][54], aiming to address the mass effect on in-medium jet shower evolution. Among them, the nuclear modification factor R pA [55,56] and R AA [52] of heavy flavor jet offer strong tools for quantifying the cold nuclear matter (CNM) effects in initial-state and the in-medium quenching effects in the subsequent formed QGP [57][58][59][60][61]. Especially, the recent reported radial distributions of charm meson in jets by CMS collaboration provide an interesting opportunity to investigate the diffusions effects of heavy quarks as well as the modified substructure of heavy flavor jets in nucleus-nucleus collisions from a new angle [54], and the detailed discussion for c-jet has been presented in our previous work [61].…”

Section: Introductionmentioning

confidence: 99%

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Diffusion of charm quarks in jets in high-energy heavy-ion collisions

et al. 2019

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Heavy flavor physics in high-energy heavy-ion collisions is a promising and active area to study the mass dependence of the " jet quenching " effects both at the RHIC and the LHC. In this talk, we present the first theoretical study on the D 0 meson radial distributions relative to the jet axis both in p+p and Pb+Pb collisions at √ s NN = 5.02 TeV, where a nice agreement of our results with experimental data is observed. The in-medium parton propagations are described by a Monte Carlo transport model which uses the next-to-leading order (NLO) plus parton shower (PS) event generator SHERPA as input and includes elastic (collisional) and inelastic (radiative) in-medium interaction of heavy flavor jet. We find that, at low D 0 meson p T , the radial distribution significantly shifts to larger radius indicating a strong diffusion effect, and the diffusion effects decrease quickly with p T ,which is consistent with the recent CMS measurements. We demonstrate that the angular deviation of charm quarks is sensitive to D s but notq, which may provide new constrains on the collisional and radiative heavy quark energy loss.

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Section: Shell Model: In-medium Jet Evolutionmentioning

confidence: 99%

Section: Shell Model: In-medium Jet Evolutionmentioning

confidence: 99%

Section: Shell Model: In-medium Jet Evolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diffusion of charm quarks in jets in high-energy heavy-ion collisions

et al. 2019

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Section: Shell Model: In-medium Jet Evolutionmentioning

confidence: 99%

Radial profile of bottom quarks in jets in high-energy nuclear collisions *

et al. 2021

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Angular correlations between heavy quark (HQ) and its tagged jet are potentially new tools to gain insight into the in-medium partonic interactions in relativistic heavy-ion collisions. In this work, we present the first theoretical study on the radial profiles of B mesons in jets in Pb+Pb collisions at the LHC. The initial production of bottom quark tagged jet in p+p is computed by SHERPA which matches the next-to-leading order matrix elements with contributions of parton shower, whereas the massive quark traversing the QGP described by a Monte Carlo model SHELL which can simultaneously simulate light and heavy flavor in-medium energy loss within the framework of Langevin evolution. In p+p collisions, we find that at lower p Q T the radial profiles of heavy flavors in jets are sensitive to the heavy quark mass. In 0 − 10% Pb+Pb collisions at √ sNN = 5.02 TeV, we observe an inverse modification pattern of the B mesons radial profiles in jets at 4 < p Q T < 20 GeV compared to that of D mesons: the jet quenching effects narrow the jet radial profile of B mesons in jets while broaden that of D mesons in jets. We find that in A+A collisions, the contribution dissipated from the higher p Q T > 20 GeV region naturally has a narrower initial distribution and consequently leads to a narrower modification pattern of radial profile; however the diffusion nature of the heavy flavor in-medium interactions will give rise to a broader modification pattern of radial profile. These two effects consequently compete and offset with each other, and the b quarks in jets benefit more from the former and suffers less diffusion effect compared to that of c quarks in jets. These findings can be tested in the future experimental measurements at the LHC to gain better understanding of the mass effect of jet quenching.

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Inclusive heavy flavor jet production with semi-inclusive jet functions: from proton to heavy-ion collisions

Vitev

2019

J. High Energ. Phys.

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The past several years have witnessed important developments in the QCD theory of jet production and jet substructure in hadronic collisions. In the framework of soft-collinear effective theory, semi-inclusive jet functions and semi-inclusive fragmenting jet functions have allowed us to combine higher order calculations with resummation of potentially large logarithms of the jet radius, ln R. Very recently, the semi-inclusive jet functions for partons fragmenting into heavy flavor jets were computed by Dai, Kim and Leibovich. In this paper we show how the formalism can be extended to c-jet and b-jet production in heavy ion collisions. The semi-inclusive jet functions for heavy flavor jets in a QCD medium are evaluated up to the next-to-leading order in α s and first order in opacity. For phenomenological applications, we also consider the inclusion of the cold nuclear matter effects and the jet energy dissipation due to collisional interactions in matter. We present the numerical predictions for the cross sections and the corresponding nuclear modification factors in proton-nucleus and nucleus-nucleus collisions and compare our results to data from the Large Hadron Collider.where f a,b denotes the usual PDF for parton a or b, dσ ab→c (ŝ, p T ,η, µ)/dvdz represents the hard function for the sub-process ab → c, and J J/c is the jet function describing the probability of a parton c with transverse momentum p T /z c to fragment into a jet J with p T . The variablesŝ andη are the partonic center-of-mass energy and parton rapidity. The SiJFs depend on the momentum fraction z c taken by the jet, the jet energy w J , R = R/ cosh(η) from the jet reconstruction algorithm, and the quark mass m Q . The ln R resummation for jet production can be achieved by evolving the SiJFs from the jet scale µ J to the

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Transverse momentum balance and angular distribution of dijets in Pb + Pb collisions *

Cited by 20 publications

References 77 publications

Diffusion of charm quarks in jets in high-energy heavy-ion collisions

Diffusion of charm quarks in jets in high-energy heavy-ion collisions

Radial profile of bottom quarks in jets in high-energy nuclear collisions *

Inclusive heavy flavor jet production with semi-inclusive jet functions: from proton to heavy-ion collisions

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