scholarly journals Vector mesonω−ϕmixing and their form factors in the light-cone quark model

2008 ◽  
Vol 78 (7) ◽  
Author(s):  
Wen Qian ◽  
Bo-Qiang Ma
Keyword(s):  
Quark Model ◽  
Light Cone ◽  
Form Factors

scholarly journals Study of Rare Semileptonic Bc+→D+νν- Decay in the Light-Cone Quark Model

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Nisha Dhiman ◽  
Harleen Dahiya
Keyword(s):  
Quark Model ◽  
Light Cone ◽  
Continuation Method ◽  
Branching Ratio ◽  
Form Factors ◽  
Analytic Solutions ◽  
Model Predictions ◽  
Timelike Region ◽  
Mixing Matrix ◽  
Near Future

We study the exclusive semileptonic rare Bc+→D+νν¯ decay in the framework of light-cone quark model. The transition form factors f+(q2) and fT(q2) are evaluated in the timelike region using the analytic continuation method in q+=0 frame. The analytic solutions of these form factors are compared with the results obtained from the double pole parametric form. The branching ratio for Bc+→D+νν¯ decay is calculated and compared with the other theoretical model predictions. The predicted results in this model can be tested at the LHCb experiments in near future which will help in testing the unitarity of CKM quark mixing matrix, thus providing an insight into the phenomenon of CP violation.

scholarly journals Light-cone sum rules for proton decay

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Ulrich Haisch ◽  
Amando Hala
Keyword(s):  
Lattice Qcd ◽  
Light Cone ◽  
Sum Rules ◽  
State Of The Art ◽  
Form Factors ◽  
Baryon Number ◽  
Proton Decay ◽  
Matrix Elements ◽  
Decay Channels ◽  
Systematic Uncertainties

Abstract We estimate the form factors that parametrise the hadronic matrix elements of proton-to-pion transitions with the help of light-cone sum rules. These form factors are relevant for semi-leptonic proton decay channels induced by baryon-number violating dimension-six operators, as typically studied in the context of grand unified theories. We calculate the form factors in a kinematical regime where the momentum transfer from the proton to the pion is space-like and extrapolate our final results to the regime that is relevant for proton decay. In this way, we obtain estimates for the form factors that show agreement with the state-of-the-art calculations in lattice QCD, if systematic uncertainties are taken into account. Our work is a first step towards calculating more involved proton decay channels where lattice QCD results are not available at present.

scholarly journals Covariant nucleon electromagnetic form factors from the Goldstone-boson-exchange quark model

2001 ◽  
Vol 511 (1) ◽  
pp. 33-39 ◽  
Author(s):  
R.F. Wagenbrunn ◽  
S. Boffi ◽  
W. Klink ◽  
W. Plessas ◽  
M. Radici
Keyword(s):  
Quark Model ◽  
Goldstone Boson ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Boson Exchange

scholarly journals Space- and time-like electromagnetic pion form factors in light-cone pQCD

2010 ◽  
Vol 693 (2) ◽  
pp. 102-107 ◽  
Author(s):  
Jiunn-Wei Chen ◽  
Hiroaki Kohyama ◽  
Kazuaki Ohnishi ◽  
Udit Raha ◽  
Yue-Long Shen
Keyword(s):  
Light Cone ◽  
Form Factors ◽  
Space And Time
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