$\psi (2S)$ enhancement in p–Pb collision as an indication of quark–gluon plasma formation at the Large Hadron Collider

Ganesh, S.; Singh, Captain R.; Mishra, M.

doi:10.1088/1361-6471/aaa46a

Cited by 3 publications

(2 citation statements)

References 36 publications

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“…It may be possible since the number of participants (N part ) in p-Pb collision at centrality class 0-5% is approximately equal to the N part in Pb-Pb collision at centrality class 80-100%. At this centrality class, there is a finite chance of QGP formation even in p-Pb collisions at the available LHC energies [47]. If QGP exists in such a small system, its life-time would obviously be comparatively less (∼ 2 − 3 fm) than the QGP life-time (∼ 6 − 9 fm) formed in Pb-Pb collisions.…”

Section: Introductionmentioning

confidence: 98%

Centrality and transverse momentum dependent suppression of $$\Upsilon (1S)$$ Υ ( 1 S ) and $$\Upsilon (2S)$$

2019

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Deconfined QCD matter in heavy-ion collisions has been a topic of paramount interest for many years. Quarkonia suppression in heavy-ion collisions at the relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) experiments indicate the quark-gluon plasma (QGP) formation in such collisions. Recent experiments at LHC have given indications of hot matter effect in asymmetric p-Pb nuclear collisions. Here, we employ a theoretical model to investigate the bottomonium suppression in Pb-Pb at √ s N N = 2.76, 5.02 TeV, and in p-Pb at √ s N N = 5.02 TeV center-of-mass energies under a QGP formation scenario. Our present formulation is based on an unified model consisting of suppression due to color screening, gluonic dissociation along with the collisional damping. Regeneration due to correlated QQ pairs has also been taken into account in the current work. We obtain here the net bottomonium suppression in terms of survival probability under the combined effect of suppression plus regeneration in the deconfined QGP medium. We mainly concentrate here on the centrality, N part and transverse momentum, p T dependence of ϒ(1S) and ϒ(2S) states suppression in Pb-Pb and p-Pb collisions at mid-rapidity. We compare our model predictions for ϒ(1S) and ϒ(2S) suppression with the corresponding experimental data obtained at the LHC energies. We find that the experimental observations on p t and N part dependent suppression agree reasonably well with our model predictions.

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Section: Introductionmentioning

confidence: 98%

Centrality and transverse momentum dependent suppression of $$\Upsilon (1S)$$ Υ ( 1 S ) and $$\Upsilon (2S)$$

2019

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show abstract

“…It may be possible since the number of participants (N part ) in p−Pb collision at centrality class 0 − 5% is approximately equal to the N part in Pb−Pb collision at centrality class 80 − 100%. At this centrality class, there is a finite chance of QGP formation even in p−Pb collisions at the available LHC energies [43]. If QGP exists in such a small system, its life-time would obviously be comparatively less (∼ 2 − 3 fm) than the QGP life-time (∼ 6 − 9 fm) formed in Pb−Pb collisions.…”

Section: Introductionmentioning

confidence: 98%

Centrality and transverse momentum dependent suppression of $Υ(1S)$ and $Υ(2S)$ in p$-$Pb and Pb$-$Pb collisions at the CERN Large Hadron Collider

Singh,

Ganesh,

Mishra

2018

Preprint

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Deconfined QCD matter in heavy-ion collisions has been a topic of paramount interest for many years. Quarkonia suppression in heavy-ion collisions at the relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) experiments indicate the quark-gluon plasma (QGP) formation in such collisions. Recent experiments at LHC have given indications of hot matter effect in asymmetric p−Pb nuclear collisions. Here, we employ a theoretical model to investigate the bottomonium suppression in Pb−Pb at √ sNN = 2.76, 5.02 TeV, and in p−Pb at √ sNN = 5.02 TeV center-of-mass energies under a QGP formation scenario. Our present formulation is based on an unified model consisting of suppression due to color screening, gluonic dissociation along with the collisional damping. Regeneration due to correlated Q Q pairs has also been taken into account in the current work. We obtain here the net bottomonium suppression in terms of survival probability under the combined effect of suppression plus regeneration in the deconfined QGP medium. We mainly concentrate here on the centrality, Npart and transverse momentum, pT dependence of Υ(1S) and Υ(2S) states suppression in Pb−Pb and p−Pb collisions at mid-rapidity. We compare our model predictions for Υ(1S) and Υ(2S) suppression with the corresponding experimental data obtained at the LHC energies. We find that the experimental observations on pT and Npart dependent suppression agree reasonably well with our model predictions.

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Impact of medium anisotropy on quarkonium dissociation and regeneration

Singh,

Jamal,

Sahoo

2024

Eur. Phys. J. C

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Quarkonium production in ultra-relativistic collisions plays a crucial role in probing the existence of hot QCD matter. This study explores quarkonia states dissociation and regeneration in the hot QCD medium while considering momentum anisotropy. The net quarkonia decay width ($$\Gamma _{D}$$ Γ D ) arises from two essential processes: collisional damping and gluonic dissociation. The quarkonia regeneration includes the transition from octet to singlet states within the anisotropic medium. Our study utilizes a medium-modified potential that incorporates anisotropy via particle distribution functions. This modified potential gives rise to collisional damping for quarkonia due to the surrounding medium, as well as the transition of quarkonia from singlet to octet states due to interactions with gluons. Furthermore, we employ the detailed balance approach to investigate the regeneration of quarkonia within this medium. Our comprehensive analysis spans various temperature settings, transverse momentum values, and anisotropic strengths. Notably, we find that, in addition to medium temperatures and heavy quark transverse momentum, anisotropy significantly influences the dissociation and regeneration of various quarkonia states.

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$\psi (2S)$ enhancement in p–Pb collision as an indication of quark–gluon plasma formation at the Large Hadron Collider

Cited by 3 publications

References 36 publications

Centrality and transverse momentum dependent suppression of $$\Upsilon (1S)$$ Υ ( 1 S ) and $$\Upsilon (2S)$$

Centrality and transverse momentum dependent suppression of $$\Upsilon (1S)$$ Υ ( 1 S ) and $$\Upsilon (2S)$$

Centrality and transverse momentum dependent suppression of $Υ(1S)$ and $Υ(2S)$ in p$-$Pb and Pb$-$Pb collisions at the CERN Large Hadron Collider

Impact of medium anisotropy on quarkonium dissociation and regeneration

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