Magnetic moments of the proton and of octet baryons in a quasiparticle diquark model

Bounding hadronic uncertainties inc→udecays

“…An I-spin study [10,11] of the BABAR amplitudes has also shown that I = 0 is dominant in the three D 0 → ρπ modes. This somewhat surprising observation has been interpreted as being consistent with SU (3) flav relationships [12] with only C and T amplitudes from other D 0 → P + V (pseudoscalar + vector) decays. The effect of penguin contributions was not required in this interpretation, however.…”

“…One can account for the effects of penguins by performing an isospin (I-spin) analysis of the hh final states (h = π, ρ) in analogy with the corresponding situations found in B decays [4][5][6][7]. Here we present a quantitative analysis of the penguin pollution in D → ππ and D → ρρ decays using existing experimental data, and compare these results with expectations from the CP selfconjugate decays D → π + π − π 0 , which appear to have a small penguin contribution [8][9][10][11][12]. 1 Charge conjugation is implied throughout.…”

Temperature Dependent Diquark and Baryon Masses

“…To calculate the effective mass of the diquark from the above expression we need the radius parameter "r" of the diquark. The radii parameter of the scalar diquarks have been used from existing literature [11][12][13][14][15] and constituent masses of quarks are taken from Karliner et al [16]. We have estimated the masses of the diquarks in the framework of the quasi particle and the results that obtained are displayed in Table 1.…”

Investigation of the light four-quark states with exotic JPC=0−−

“…The Dalitz-plot distribution of the D 0 → π + π − π 0 process was analyzed by the Babar Collaboration [1,2]. The resonant dominance sub-structure of this Cabibbo suppressed decay was then studied and indicated that an isospin-zero final state may exist [3][4][5]. The analysis of the Dalitz-plot behavior showed the typical structure of a π + π − π 0 final state with I G J PC = 0 − 0 −− [6], which is exotic and cannot be composed of a quark-antiquark pair in the conventional quark model [7,8].…”

“…The Holder inequalities can provide constraints on the sum rule window as discussed in[44][45][46] 4 Here we omit the dimension-6 and dimension-8 gluon condensate contributions which are suppressed by a loop factor. The complete evaluation of the dimension-8 quark and gluon condensate contributions considering operator mixing under renormalization was done in[43] for the 1 −+ light hybrid meson, where the contributions from the gluon condensates are comparable to those from the quark condensates.…”