dorsal/arxiv
View Schema$J/\psi$ suppression in the threshold model and QGP formation time
| Authors | A. K. Chaudhuri |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0702056 |
| URL | https://arxiv.org/abs/nucl-th/0702056 |
| DOI | 10.1016/j.physletb.2007.08.086 |
| Journal | Phys.Lett.B655:241-244,2007 |
Abstract
In the QGP motivated threshold model, in addition to the normal nuclear absorption, $J/\psi$'s are subjected to an additional "anomalous" suppression. We have analysed the recently published PHENIX data on the participant number dependence of the nuclear modification factor for $J/\psi$'s in Au+Au collisions and extracted the anomalous suppression required to explain the data. At mid rapidity $J/\psi$'s are anomalously suppressed only above a threshold density $n_c$=3.73 fm$^{-2}$. The forward rapidity data on the otherhand require that $J/\psi$'s are continuously "anomalously" suppressed. The analysis strongly indicate that in mid rapidity $J/\psi$'s are suppressed in a deconfined medium. Using the PHENIX data on the participant number dependence of the Bjorken energy density, we have also estimated the QGP formation time. For critical temperature $T_c$=192 MeV, estimated QGP formation time ranges between 0.06-0.08 fm/c.
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"abstract": "In the QGP motivated threshold model, in addition to the normal nuclear\nabsorption, $J/\\psi$\u0027s are subjected to an additional \"anomalous\" suppression.\nWe have analysed the recently published PHENIX data on the participant number\ndependence of the nuclear modification factor for $J/\\psi$\u0027s in Au+Au\ncollisions and extracted the anomalous suppression required to explain the\ndata. At mid rapidity $J/\\psi$\u0027s are anomalously suppressed only above a\nthreshold density $n_c$=3.73 fm$^{-2}$. The forward rapidity data on the\notherhand require that $J/\\psi$\u0027s are continuously \"anomalously\" suppressed.\nThe analysis strongly indicate that in mid rapidity $J/\\psi$\u0027s are suppressed\nin a deconfined medium. Using the PHENIX data on the participant number\ndependence of the Bjorken energy density, we have also estimated the QGP\nformation time. For critical temperature $T_c$=192 MeV, estimated QGP formation\ntime ranges between 0.06-0.08 fm/c.",
"arxiv_id": "nucl-th/0702056",
"authors": [
"A. K. Chaudhuri"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/j.physletb.2007.08.086",
"journal_ref": "Phys.Lett.B655:241-244,2007",
"title": "$J/\\psi$ suppression in the threshold model and QGP formation time",
"url": "https://arxiv.org/abs/nucl-th/0702056"
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