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Aqeel Ahmed
I am a theoretical physicist. My primary research interests are in theoretical particle physics and cosmology, in particular, beyond the Standard Model physics scenarios involving warped extra-dimensions, composite/holographic Higgs, Twin Higgs, flavor physics, dark matter, effective field theories, and dynamical solutions to the hierarchy problem.
Supervisors: Riazuddin, Fayyazuddin, and Bohdan Grzadkowski
Supervisors: Riazuddin, Fayyazuddin, and Bohdan Grzadkowski
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is a vector meson $(1^-)$, have been done by putting together kinematical
and dynamical analysis. An intensive use of the helicity formalism is
involved on the kinematical side, while on the dynamical side, Heavy Quark
Effective Theory (HQET) is applied to calculate the hadronic matrix elements
between the baryons $\Lambda_{b}$ and $\Lambda$. The branching ratios($%
\mathcal{BR}$) and helicity asymmetry parameters ($\alpha_{AS}$) for $%
\Lambda_{b}\to \Lambda J/\psi$, $\Lambda_{b}\to \Lambda \rho^0$ and $%
\Lambda_{b}\to \Lambda \omega$ have been calculated. Since both the decay
products are polarized, so they offer interesting opportunities to perform
tests of time reversal, CP violation and of CPT invariance. A model
independent parametrization is done via spin density matrix of the angular
distribution, polarizations and some of polarization correlations of the
decay products. The transverse component of the polarization and two
polarization correlations are sensitive to time reversal violations.
Moreover several CP- and CPT-odd observables are pointed out.
is a vector meson $(1^-)$, have been done by putting together kinematical
and dynamical analysis. An intensive use of the helicity formalism is
involved on the kinematical side, while on the dynamical side, Heavy Quark
Effective Theory (HQET) is applied to calculate the hadronic matrix elements
between the baryons $\Lambda_{b}$ and $\Lambda$. The branching ratios($%
\mathcal{BR}$) and helicity asymmetry parameters ($\alpha_{AS}$) for $%
\Lambda_{b}\to \Lambda J/\psi$, $\Lambda_{b}\to \Lambda \rho^0$ and $%
\Lambda_{b}\to \Lambda \omega$ have been calculated. Since both the decay
products are polarized, so they offer interesting opportunities to perform
tests of time reversal, CP violation and of CPT invariance. A model
independent parametrization is done via spin density matrix of the angular
distribution, polarizations and some of polarization correlations of the
decay products. The transverse component of the polarization and two
polarization correlations are sensitive to time reversal violations.
Moreover several CP- and CPT-odd observables are pointed out.