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Rare B->K*l(+)l(-) decay, two Higgs doublet model, and light cone QCD sum rules
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Date
1997-10-02
Author
Alıyev, Tahmasıb
Savcı, Mustafa
Özpineci, Altuğ
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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The decay width, forward-backward asymmetry and lepton longitudinal and transversal polarization for the exclusive B --> K* l(+)l(-) decay in a two Higgs doublet model are computed. It is shown that all these quantities are very effective tools for establishing new physics. (C) 1997 Elsevier Science B.V.
Subject Keywords
Long-distance contributions
,
Heavy top-quark
,
Backward asymmetry
,
Standard model
,
B->S-GAMMA
,
B->SL+L
,
B->X(S)TAU(+)TAU(-)
,
Polarization
,
Mesons
URI
https://hdl.handle.net/11511/35482
Journal
PHYSICS LETTERS B
DOI
https://doi.org/10.1016/s0370-2693(97)00968-4
Collections
Department of Physics, Article
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Rare B->K*l(+)l(-) decay in light cone QCD
Alıyev, Tahmasıb; Savcı, Mustafa; Özpineci, Altuğ (1997-10-01)
We investigate the transition form factors for the B-->K*l(+)l(-) (l = mu, tau) decay in light cone QCD. It is found that the light cone and three-point QCD sum rule analyses for some of the form factors for the decay B-->K*l(+)l(-) lead to absolutely different q(2) dependence. The invariant dilepton mass distributions for the B-->K*mu(+)mu(-) and B-->K*tau(+)tau(-) decays and final lepton longitudinal polarization asymmetry, which includes both short-and long-distance contributions, are also calculated.
Exclusive B -> K*l(+)l(-) decay in the three Higgs doublet model
Iltan, EO (2000-03-01)
We study the differential branching ratio and CP asymmetry for the exclusive decay B --> K*l(+)l(-) in the three Higgs doublet model with an additional global O(2) symmetry in the Higgs sector. We analyze the dilepton mass square q(2) dependency of these quantities. Further, we study the effect of a new parameter of the global symmetry in the Higgs sector on the differential branching ratio and CP asymmetry. We see that there exists an enhancement in the branching ratio and considerable CP violation for the...
Exclusive B -> K*l(+)l(-) decay with polarized K* and new physics effects
Alıyev, Tahmasıb; Özpineci, Altuğ; Savcı, Mustafa (2001-06-28)
Using the most general, model independent effective Hamiltonian, the branching ratio of the B --> K* l(+)l(-) decay, when K* meson is longitudinally or transversally polarized, is presented. The dependence of the branching ratio on the new Wilson coefficients, when K* meson is polarized. is studied. It is observed that the branching ratio is very sensitive to the vector and tenser type interactions, which will be useful in search of new physics beyond the Standard Model.
Rare radiative B-s -> tau(+) tau(-) gamma decay in the two Higgs doublet model
Iltan, EO; Turan, Gürsevil (2000-02-01)
The radiative B-s-->tau(+)tau(-)gamma decay is investigated in the framework of the two Higgs doublet model. The dependence of the differential branching ratio on the photon energy and the branching ratio on the two Higgs doublet model parameters m(H+) and tan beta are studied. It is shown that there is an enhancement in the predictions of the two Higgs doublet model compared to the standard model case. We also observe that contributions of neutral Higgs bosons to the decay are sizable when tan beta is large.
Magnetic dipole moments of the negative parity J(PC)=2(--) mesons in QCD
Alıyev, Tahmasıb; Savcı, Mustafa (2018-04-18)
Magnetic dipole moments of the negative parity light and heavy tensor mesons are calculated within the light cone QCD sum rules method. The results are compared with the positive parity counterparts of the corresponding tensor mesons. The results of the analysis show that the magnetic dipole moments of the negative parity light mesons are smaller compared to those of the positive parity mesons. Contrary to the light meson case, magnetic dipole moments of the negative parity heavy mesons are larger than the ...
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T. Alıyev, M. Savcı, and A. Özpineci, “Rare B->K*l(+)l(-) decay, two Higgs doublet model, and light cone QCD sum rules,”
PHYSICS LETTERS B
, pp. 216–228, 1997, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35482.