Speaker
Mrs
Sarbani Majumder
(Bose Institute)
Description
We present a study of $\tau^+ \tau^-$ lepton pair production in
Pb + Pb collisions at $\sqrt{s_{NN}}$ = 5.5 TeV. The larger
mass of tau lepton compared to electron and muon leads to
considerably small hadronic contribution to the
$\tau^+ \tau^-$ pair invariant mass (M) distribution relative
to the production from thermal partonic sources. The
quark–anti-quark annihilation processes via intermediary
virtual photon, Z and Higgs bosons have been
considered for the tau lepton production.
The contribution from Drell–Yan process is found to dominate
over thermal yield for $\tau^+ \tau^-$ pair mass from 4 to
20 GeV at the LHC energy.
We also present the ratio of
$\tau$ lepton pair yields for nucleus–nucleus collisions
relative to yields from p + p collisions scaled by number
of binary collisions at LHC energies as a function $\tau$
lepton pair inavariant mass.
The ratio is found to be significantly above
unity for the mass range 4 to 6 GeV.
This indicates the possibility of detecting $\tau^+ \tau^-$
pair from quark–gluon plasma (QGP) in the mass window 4 to 6
GeV.
Author
Mrs
Sarbani Majumder
(Bose Institute)
Co-authors
Dr
Bedangadas Mohanty
(NISER, Bhubaneswar)
Prof.
Jan-e Alam
(VECC, Kolkata.)
Dr
Rajarshi Ray
(Bose Institute, Kolkata)
Prof.
Sanjay Ghosh
(Bose Institute, Kolkata.)
