M. Jamil Aslam

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In the present study, glucose oxidase was produced in shake culture by the parent Aspergillus niger with corn steep liquor as substrate. Glucose oxidase produced was then purified by subjecting to 60-85% saturation of ammonium sulfate precipitation and further purified by ion exchange and gel filtration chromatography respectively. Desalted sample of(More)
We study long-distance effects in the rare exclusive semileptonic decays B →K1 + , where K1 is the axial vector meson. The form factors describing the meson transition amplitudes of the effective Hamiltonian are calculated using the Ward identities, which are then used to calculate the branching ratio and the forward–backward asymmetry in these decay modes.(More)
The effect of weak annihilation and u-quark penguin contribution on the branching ratio B → K1γ at next-to-leading order of αs are calculated using LEET approach. It is shown that the value of LEET form factor remains the same in the range of unitarity triangle phase α favored by the Standard Model. CP-asymmetry for above mentioned decay has been calculated(More)
Form factors parameterizing radiative leptonic decays of heavy mesons (B+ → γlνl) for photon energy are computed in the language of dispersion relation. Constraints provided by Ward Identities and gauge invariance are used to provide useful information for parameters needed. The couplings gBB∗γ , fBB∗ A γ and gBB∗ A γ are also predicted. The value of the(More)
Form factors parameterizing radiative leptonic decays of heavy mesons (B+ → γlνl) for photon energy are computed in the language of dispersion relation. The contributing states to the absorptive part in the dispersion relation are the multiparticle continum, estimated by quark triangle graph and resonances with quantum numbers 1 and 1+ which includes B andB(More)
Form factors parameterizing radiative leptonic decays of heavy mesons (B+ → γlνl) for photon energy are computed using Ward Identities. The couplings gBB∗γ , fBB∗ A γ and gBB∗ A γ are also predicted. The value of the branching ratio for the process B+ → γμνμ is found to be 2.26 × 10−6. This is reduced by 20.4% if FA = FV is taken. A detailed comparison is(More)
The discovery of the baryonic states P c (4380) and P + c (4450) by the LHCb collaboration in the process pp → bb̄ → ΛbX, followed by the decay Λ 0 b → J/ψ p K− has evoked a lot of theoretical interest. These states have the minimal quark content cc̄uud, as suggested by their discovery mode J/ψ p, and the preferred J assignments are 52 + for the P c (4450)(More)
The LHCb discovery of the two baryonic states P c (4380) and P + c (4450), having J P = 3/2− and J = 5/2, respectively, in the process pp → bb̄ → ΛbX, followed by the decay Λb → J/ψ p K−, has motivated a number of theoretical models. Interpreting them as compact {c̄ [cu] [ud];LP = 0, 1} objects, the mass spectroscopy of the J = 3/2− and J = 5/2 pentaquarks(More)
We analyze the Belle data [K. F. Chen (Belle Collaboration), Phys. Rev. Lett. 100, 112001 (2008); I. Adachi (Belle Collaboration), arXiv:0808.2445] on the processes e+ e- --> Upsilon(1S)pi+ pi-, Upsilon(2S)pi+ pi- near the peak of the Upsilon(5S) resonance, which are found to be anomalously large in rates compared to similar dipion transitions between the(More)
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