Investigation of the Ds1 structure via Bc to Ds1l(+)l(-)/nu(nu)over-bar transitions in QCD

Download

index.pdf

Date

2009-09-01

Author

Khosravi, R.
Azizi, K.
Ghanaatian, M.
Falahati, F.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

145
views

73
downloads

We investigate the structure of the D-s1(2460, 2536)(J(P) = 1(+)) mesons via analyzing the semileptonic B-c -> D(s1)l(+)l(-), l = tau, mu, e and B-c -> D-s1 nu(nu) over bar transitions in the framework of the three-point QCD sum rules. We consider the D-s1 meson in two ways, the pure vertical bar c (s) over bar > state and then as a mixture of two vertical bar P-3(1)> and vertical bar P-1(1)> states. Such types of rare transitions take place at loop level by electroweak penguin and weak box diagrams in the standard model via the flavor changing neutral current transition of b -> s. The relevant form factors are calculated taking into account the gluon condensate contributions. These form factors are numerically obtained for vertical bar c (s) over bar > case and plotted in terms of the unknown mixing angle theta(s), when the D-s1 meson is considered as a mixture of two vertical bar P-3(1)> and vertical bar P-1(1)> states. The obtained results for the form factors are used to evaluate the decay rates and branching ratios. Any future experimental measurement on these form factors as well as decay rates and branching fractions and their comparison with the obtained results in the present work can give considerable information about the structure of this meson and the mixing angle theta(s).

Subject Keywords

Nuclear and High Energy Physics

URI

https://hdl.handle.net/11511/67598

Journal

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS

DOI

https://doi.org/10.1088/0954-3899/36/9/095003

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Analysis of the rare semileptonic B-c -> P(D, D-s)l(+)l(-)/nu(nu)over-bar decays within QCD sum rules Azizi, K.; Khosravi, R. (American Physical Society (APS), 2008-08-01) Considering the gluon condensate corrections, the form factors relevant to the semileptonic rare B-c -> D, D-s(J(P) = 0(-))l(+)l(-) with l = tau, mu, e and B-c -> D, D-s(J(P) = 0(-))nu(nu) over bar transitions are calculated in the framework of the three point QCD sum rules. The heavy quark effective theory limit of the form factors is computed. The branching fraction of these decays is also evaluated and compared with the predictions of the relativistic constituent quark model. Analyzing such transitions c...
Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC Aad, G.; et. al. (Elsevier BV, 2013-10-01) Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, H -> gamma gamma, H -> ZZ* -> 4l and H -> WW* -> l nu l nu. The results are based on the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of root s = 7 TeV and root s = 8 TeV, corresponding to an integrated luminosity of about 25 fb(-1). Evidence for Higgs boson production through vector-boso...
Measurement of the W -> tau nu(tau) cross section in pp collisions at root s=7 TeV with the ATLAS experiment Aad, G.; et. al. (Elsevier BV, 2012-01-05) The cross section for the production of W bosons with subsequent decay W -> tau nu(tau) is measured with the ATLAS detector at the LHC. The analysis is based on a data sample that was recorded in 2010 at a proton-proton center-of-mass energy of root s = 7 TeV and corresponds to an integrated luminosity of 34 pb(-1). The cross section is measured in a region of high detector acceptance and then extrapolated to the full phase space. The product of the total W production cross section and the W -> tau nu(tau) ...
Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at root s=13 TeV Sirunyan, A. M.; et. al. (Springer Science and Business Media LLC, 2017-11-01) Properties of the Higgs boson are measured in the H -> ZZ -> 4l (l = e, mu) decay channel. A data sample of proton-proton collisions at root s = 13 TeV, collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 35.9 fb(-1) is used. The signal strength modifier mu, defined as the ratio of the observed Higgs boson rate in the H -> ZZ -> 4l decay channel to the standard model expectation, is measured to be mu = 1.05(-0.17)(+0.19) at m(H) = 125.09 GeV, the combined ATLAS and CM...
Measurement of the mass of the top quark in decays with a J/psi meson in pp collisions 8 Tev Khachatryan, V.; et. al. (Springer Science and Business Media LLC, 2016-12-01) A first measurement of the top quark mass in the decay channel t -> (W -> l nu)(b -> J/psi + X -> mu(+) + mu(-) + X) is presented. The analysis uses events selected from the proton-proton collisions recorded by the CMS detector at the LHC at a center-of-mass energy of 8TeV. The data correspond to an integrated luminosity of 19.7 fb(-1), with 666 t (t) over bar and single top quark candidate events containing a reconstructed J/psi candidate decaying into an oppositely-charged muon pair. The mass of the (J/ps...

Citation Formats

R. Khosravi, K. Azizi, M. Ghanaatian, and F. Falahati, “Investigation of the Ds1 structure via Bc to Ds1l(+)l(-)/nu(nu)over-bar transitions in QCD,” JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, pp. 0–0, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67598.