Tuesday, February 14, 2012

1111.5173 (N. G. Deshpande et al.)

Anomalous Triple Gauge Boson Couplings in $e^{-}e^{+} \to γγ$
for Non Commutative Standard Model
   [PDF]

N. G. Deshpande, Sumit K. Garg
We investigate $e^{+}e^{-}\to \gamma\gamma$ process within the Seiberg-Witten
expanded noncommutative standard model(NCSM) scenario in the presence of
anomalous triple gauge boson couplings. This study is done with and without
initial beam polarization and we restrict ourselves to leading order effects of
non commutativity i.e. $O(\Theta)$. The non commutative(NC) corrections are
sensitive to the electric component($\vec{\Theta}_E$) of NC parameter. We
include the effects of earth rotation in our analysis. This study is done by
investigating the effects of non commutativity on different time averaged cross
section observables. We have also defined forward backward asymmetries which
will be exclusively sensitive to anomalous couplings. We have looked into the
sensitivity of these couplings at future experiments at the International
Linear Collider(ILC). This analysis is done under realistic ILC conditions with
the Center of mass energy(c.m.) $\sqrt{s}=800$GeV and integrated luminosity
L=500fb${}^{-1}$. The scale of non commutativity is assumed to be $\Lambda =
1$TeV. The limits on anomalous couplings of the order $10^{-1}$ from forward
backward asymmetries while much stringent limits of the order $10^{-2}$ from
total cross section are obtained if no signal beyond SM is seen.
View original: http://arxiv.org/abs/1111.5173

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