Medium-induced parton splitting kernels from Soft Collinear Effective Theory with Glauber gluons

Ovanesyan, Grigory; Vitev, Ivan

doi:10.1016/j.physletb.2011.11.040

Cited by 107 publications

(153 citation statements)

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“…The medium-induced radiative corrections factorize as a standard integral convolution [65]. If P q,g (ǫ) is the probability density for quarks and gluons to lose a fraction ǫ of their energy, it can be implemented in the cross section calculation as follows [25]:…”

Section: Cold Nuclear Matter Effectsmentioning

confidence: 99%

High transverse momentum quarkonium production and dissociation in heavy ion collisions

2013

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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 contributions and feed-down effects from excited states. In reactions with ultra-relativistic nuclei, we focus on the consistent implementation of dynamically calculated nuclear matter effects, such as coherent power corrections, cold nuclear matter energy loss, and the Cronin effect in the initial state. In the final state, we consider radiative energy loss for the color-octet state and collisional dissociation of quarkonia as they traverse through the QGP. Theoretical results are presented for J/ψ and Υ and compared to experimental data where applicable. At RHIC, a good description of the high-pT J/ψ modification observed in central Cu+Cu and Au+Au collisions can be achieved within the model uncertainties. We find that measurements of J/ψ yields in proton-nucleus reactions are needed to constrain the magnitude of cold nuclear matter effects. At the LHC, a good description of the experimental data can be achieved only in mid-central and peripheral Pb+Pb collisions. The large five-fold suppression of prompt J/ψ in the most central nuclear reactions may indicate for the first time possible thermal effects at the level of the quarkonium wavefunction at large transverse momenta.

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Section: Cold Nuclear Matter Effectsmentioning

confidence: 99%

High transverse momentum quarkonium production and dissociation in heavy ion collisions

2013

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“…In equation 1 P q,g ( ) is the probability that a fraction of the parent parton is redistributed through medium-induced multiple gluon emission. We employ the soft gluon emission limit of the of the SCET G [19,20] splitting functions [21,22] used to predict inclusive light hadron attenuation in heavy ion collisions [23,24]. We note that the spectrum coincides with the original energy loss derivation of [25].…”

Section: Heavy Ion Collisions Collisionsmentioning

confidence: 99%

Vector boson tagged jets and jet substructure

Vitev

2018

EPJ Web of Conferences

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Abstract. In these proceedings, we report on recent results related to vector boson-tagged jet production in heavy ion collisions and the related modification of jet substructure, such as jet shapes and jet momentum sharing distributions. Z 0 -tagging and γ-tagging of jets provides new opportunities to study parton shower formation and propagation in the quark-gluon plasma and has been argued to provide tight constrains on the energy loss of reconstructed jets. We present theoretical predictions for isolated photon-tagged and electroweak boson-tagged jet production in Pb+Pb collisions at √ s NN = 5.02 TeV at the LHC, addressing the modification of their transverse momentum and transverse momentum imbalance distributions. Comparison to recent ATLAS and CMS experimental measurements is performed that can shed light on the medium-induced radiative corrections and energy dissipation due to collisional processes of predominantly quark-initiated jets. The modification of parton splitting functions in the QGP further implies that the substructure of jets in heavy ion collisions may differ significantly from the corresponding substructure in proton-proton collisions. Two such observables and the implication of tagging on their evaluation is also discussed.

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“…Red and green solid lines correspond to full splitting and soft x approximation respectively, using analytical formulas from Ref. [11], same colors but dashed lines represent numerical integration. Right panel: medium-induced splitting q → qg taking into account medium-recoil and finite phase-space cuts.…”

Section: Medium-induced Splitting Kernelsmentioning

confidence: 99%

“…[11]. The vacuum splitting functions P (i) vac (x) are well known [12] and we do not present them here for brevity.…”

Section: Medium-induced Splitting Kernelsmentioning

confidence: 99%

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Medium-induced splitting kernels from SCETG

Ovanesyan

2013

Nuclear Physics A

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Using the framework of soft-collinear effective theory with Glauber gluons (SCET G ), we evaluate medium-induced splitting kernels. Because of the power counting of the effective theory, our results are valid for arbitrary, not necessarily small values of the energy fraction x taken by the emitted parton. In this framework we prove the factorization from the hard process and gauge invariance of the splitting kernels, we also show how nuclear recoil and the phase space cuts can be implemented into the phenomenology.

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Medium-induced parton splitting kernels from Soft Collinear Effective Theory with Glauber gluons

Cited by 107 publications

References 64 publications

High transverse momentum quarkonium production and dissociation in heavy ion collisions

High transverse momentum quarkonium production and dissociation in heavy ion collisions

Vector boson tagged jets and jet substructure

Medium-induced splitting kernels from SCETG

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