Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Roberto R. Mendel"'
Publikováno v:
Physical Review D. 55:419-422
We extend our recent work, in which the Dirac equation with a {open_quotes}(asymptotically free) Coulomb + (Lorentz scalar {gamma}{sub 0}{sigma}r) linear{close_quotes} potential is used to obtain the light quark wave function for q{bar Q} mesons in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b7e7177448c761e01d52ff04e9d8561
https://doi.org/10.1103/physrevd.55.419
https://doi.org/10.1103/physrevd.55.419
Publikováno v:
Physical Review Letters. 74:4984-4987
We study {ital CP} asymmetries in {ital B}{sup {plus_minus}}{r_arrow}{ital h}{pi}{sup {plus_minus}} decays, where the hadronic states {ital h}={rho}{rho}, {ital K{bar K}}{pi}, {pi}{sup +}{pi}{sup {minus}}{ital K}{sup +}{ital K}{sup {minus}}, etc., an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c5fff45c11903a93f664374bf7b6291
https://doi.org/10.1103/physrevlett.74.4984
https://doi.org/10.1103/physrevlett.74.4984
Publikováno v:
Zeitschrift für Physik C Particles and Fields. 63:71-76
A simple model for the hadronic contribution to the photon vacuum polarization function $\Pi_{had}(q^2)$, for spacelike momenta, is presented. For small momenta, the two loop contribution from the pseudoscalar meson octet is computed from the chiral
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59bfbe41ce0274d09ee21ac9289d8b7d
https://doi.org/10.1007/bf01577545
https://doi.org/10.1007/bf01577545
Autor:
Howard D. Trottier, Roberto R. Mendel
Publikováno v:
Physical Review D. 46:2068-2079
We present a detailed analysis of effects on the decay constants {ital f}{sub {ital P}} and mixing parameters {ital B} of the pseudoscalar {ital Q{bar q}} mesons, coming from two fundamental dynamical properties of this system: relativistic dynamics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94269e03eb086b2d6dad98cb9f0cc3e9
https://doi.org/10.1103/physrevd.46.2068
https://doi.org/10.1103/physrevd.46.2068
Publikováno v:
Physical Review D. 45:4178-4185
We present a model of quark mass generation where the observed intergeneration mass hierarchy, large ratio $\frac{{m}_{t}^{2}}{{m}_{b}^{2}}\ensuremath{\gg}1$, and flavor mixing can all arise naturally. The basic assumption is that only the charge ⅔
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c71e6b597139a287fe75d40e0a6f5f4
https://doi.org/10.1103/physrevd.45.4178
https://doi.org/10.1103/physrevd.45.4178
Autor:
Roberto R. Mendel, V. A. Miransky
Publikováno v:
Physics Letters B. 268:384-388
We show how masses for heavy fermioons (like t , t ′, b ′, etc.) can be obtained in a technicolor scenario without encountering a serious fine tuning problem, provided the self-interaction of fermions is properly taken into account. It is pointed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61e8fb87a4632a99ecf87137b6119236
https://doi.org/10.1016/0370-2693(91)91594-l
https://doi.org/10.1016/0370-2693(91)91594-l
Publikováno v:
Zeitschrift f�r Physik C Particles and Fields. 52:145-148
We study the emission of a hard photon in the spectator, free quark approximation ofB meson decays. We thus obtain an estimate for the high end of the photon spectrum in the processb→X u,c+γ and in the processesb→ $$\bar c$$ +X u,c+γ andb→l $
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d3c186b9e0bfcffd7fab599242cf2ac
https://doi.org/10.1007/bf01412337
https://doi.org/10.1007/bf01412337
Autor:
Roberto R. Mendel, Mohammad Ahmady
Publikováno v:
Zeitschrift für Physik C Particles and Fields. 65:263-265
The decay rates for the exclusive B decays $B \rightarrow K \eta_c $ and $B \rightarrow K^* \eta_c$ are calculated in the context of the heavy quark effective theory. We obtain $\Gamma (B \rightarrow K \eta_c )/\Gamma (B\rightarrow K\psi )=1.6 \pm 0.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b7e251fd462f06aa71d168e19dc3cd9
https://doi.org/10.1007/bf01571882
https://doi.org/10.1007/bf01571882
Publikováno v:
Physical review. D, Particles and fields. 52(1)
Fits to the data give {bar {Lambda}} {sub {ital u},}{ital d}{sup 2}/{sigma}=4.8{plus_minus}1.7, {minus}{xi}{sub {ital u},}{ital d}{sup {prime}}(1)=2.4{plus_minus}0.7, and {vert_bar}{ital V}{sub {ital c}{ital b}}{vert_bar} {radical}{tau}{sub {ital B}}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::290016362bed6b365232e80400fafd0b
https://pubmed.ncbi.nlm.nih.gov/10019038
https://pubmed.ncbi.nlm.nih.gov/10019038
Publikováno v:
Physical review. D, Particles and fields. 49(1)
We prove that the coefficient of the longitudinal part of the [ital W]-boson propagator close to resonance is equal to 1/([ital M][sub [ital W]][sup 2]+[ital i][epsilon][sub [ital L]]), where [epsilon][sub [ital L]] is proportional to squares of mass
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b144d93ea81d8edf8b01f82e08ccbf3
https://pubmed.ncbi.nlm.nih.gov/10016765
https://pubmed.ncbi.nlm.nih.gov/10016765