Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Roberts, Winston"'
Autor:
Hussain, Md Mozammel, Roberts, Winston
Publikováno v:
Phys. Rev. D 95, 053005 (2017)
Hadronic form factors for semileptonic decay of the $\Lambda_c$ are calculated in a nonrelativistic quark model. The full quark model wave functions are employed to numerically calculate the form factors to all relevant orders in ($1/m_c$, $1/m_s$).
Externí odkaz:
http://arxiv.org/abs/1701.03876
Autor:
Crede, Volker, Roberts, Winston
The composite nature of baryons manifests itself in the existence of a rich spectrum of excited states, in particular in the important mass region 1-2 GeV for the light-flavoured baryons. The properties of these resonances can be identified by system
Externí odkaz:
http://arxiv.org/abs/1302.7299
Autor:
Eakins, Benjamin, Roberts, Winston
For very heavy quarks, the two heavy quarks in a doubly heavy baryon are expected to form a pointlike, heavy diquark in an antitriplet color configuration. In this limit the dynamics of the light degrees of freedom `factorize' from the dynamics of th
Externí odkaz:
http://arxiv.org/abs/1208.4616
Autor:
Mott, Lonnie, Roberts, Winston
Hadronic form factors for the rare weak transitions $\Lambda_{b}\rightarrow\Lambda^{(*)}$ are calculated using a nonrelativistic quark model. The form factors are extracted in two ways. An analytic extraction using single component wave functions (SC
Externí odkaz:
http://arxiv.org/abs/1108.6129
Autor:
Pervin, Muslema, Roberts, Winston
Publikováno v:
Phys.Rev.C77:025202,2008
We apply a quark model developed in earlier work to the spectrum of baryons with strangeness -2 and -3. The model describes a number of well-established baryons successfully, and application to cascade baryons allows the quantum numbers of some known
Externí odkaz:
http://arxiv.org/abs/0709.4000
Publikováno v:
Phys.Rev.C72:035201,2005
The semileptonic decays of Lambda_c and Lambda_b are treated in the framework of a constituent quark model. Both nonrelativistic and semirelativistic Hamiltonians are used to obtain the baryon wave functions from a fit to the spectra, and the wave fu
Externí odkaz:
http://arxiv.org/abs/nucl-th/0503030
Publikováno v:
Phys.Lett.B570:185-190,2003
The Theta+(1540), recently observed at LEPS, DIANA and CLAS, is hypothesized to be an isotensor resonance. This implies the existence of a multiplet where the Theta++, Theta+ and Theta0 have isospin-violating strong decays, and the Theta+++ and Theta
Externí odkaz:
http://arxiv.org/abs/hep-ph/0307019
Autor:
Roberts, Winston
Publikováno v:
Phys.Rev.D68:013005,2003
We briefly discuss the predictions of the heavy quark effective theory for the semileptonic decays of a heavy pseudoscalar to a light one, or to a light vector meson. We point out that measurement of combinations of differential helicity decay rates
Externí odkaz:
http://arxiv.org/abs/hep-ph/0204356
Autor:
Roberts, Winston
A pole model for the form factors describing heavy to light meson transitions is constructed, and the results compared with the predictions of the heavy quark effective theory (HQET). While most of the HQET-predicted relationships among form factors
Externí odkaz:
http://arxiv.org/abs/hep-ph/0204260
Autor:
Waryoba, Daudi R., Roberts, Winston
Publikováno v:
In Current Applied Physics October 2017 17(10):1288-1297
