Suppression of charged particle production at large transverse momentum in central Pb–Pb collisions at sNN=2.76 TeV

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

“…All of the above effects can be of the same order, as one can see from our numerical simulation results in section IV. This program of improving the theoretical accuracy of jet quenching simulations is especially interesting in light of recent RHIC and LHC heavy ion results [5]- [7], [17]- [23] and we plan to show first phenomenological applications in the near future.…”

“…The suppression in the production rate of energetic leading particles and particle correlations due to finalstate interactions in reactions with ultra-relativistic nuclei is among the best-known experimental discoveries at the Relativistic Heavy Ion Collider (RHIC) [1]- [4], and now at the Large Hadron Collider (LHC) [5]- [7]. This jet quenching phenomenon also provides one of the strongest pieces of evidence for the creation of dense stronglyinteracting matter in such collisions [8].…”

Novel subjet observables for jet quenching in heavy-ion collisions

“…Considerations of the RSD distributions show that the R IQR[ΔS 12 ] carries the largest discrimination power for highp T jets, although there is an associated uncertainty of [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]% due to hadronization effects. For low-p T jets ( p T 120 GeV/c) and/or recoil-jets in dijet systems the use of the R Q 1 [ΔS 12 ] and/or the median R Q 2 [ΔS 12 ] may prove more advantageous, with hadronization uncertainties that are smaller than 5% for the chosen subjet parameters.…”

“…Experiments at RHIC and the LHC observed a strong suppression of high transverse momentum particle yields [9][10][11][12][13][14][15], suppression of inclusive and semi-inclusive yields of fully reconstructed jets [16][17][18][19][20], and, more recently, the internal structure of the jets [21][22][23][24][25] for detailed studies of jet quenching. However, in all these measurements the treatment of the background originating from the copiously produced particles not associated to hard scatterings poses an experimental challenge for precise and unbiased measurements.…”

Jet shape and fragmentation function measurements with CMS

“…The objective is to understand how a color charge (carried by quarks and gluons) is transported in the colored medium. It is well established that the parton energy loss is a consequence of the modification of the hard-scattering processes in the final state of the heavy ion collisions at RHIC and LHC [2][3][4]. It is evident in the suppression of high p T charged hadrons and jets, as well as in the associated yield in two-particle correlations measurements [5], which is accompanied by an enhancement of low p T hadrons, suggesting a softening of jet fragmentations.…”