v 1 2 0 N ov 1 99 5 HEAVY - FLAVORED STRANGE PENTAQUARK SEEMS NOT TO EXIST

98 10 43 3 v 2 2 5 N ov 1 99 8 SPIN AND ORBITAL ANGULAR MOMENTUM IN THE CHIRAL QUARK MODEL

Quark spin and orbital angular momentum in the nucleon are calculated in symmetry-breaking chiral quark model. The results are compared with data and other models. Synopsis: Recent measurements show (1) strong flavor asymmetry of the antiquark sea 1 : ¯ d > ¯ u, (2) nonzero strange quark content 2 : < ¯ ss > = 0, (3) sum of quark spins is small 3 : < s z > q+¯ q = 0.1 − 0.2, and (4) antiquark s...

ar X iv : a st ro - p h / 98 11 19 7 v 1 1 2 N ov 1 99 8 The ‘ bare ’ strange stars might not be bare

ar X iv : h ep - l at / 9 71 10 28 v 1 1 5 N ov 1 99 7 1 First study of B → π semileptonic decay form factors using NRQCD

We present a quenched calculation of the form factors of the semileptonic weak decay B → πl¯ ν with O(1/mQ) NRQCD heavy quark and Wilson light quark on a 16 3 × 32 lattice at β = 5.8. The form factors are evaluated at six heavy quark masses, in the range of mQ ∼ 1.5 − 8 GeV. 1/mQ dependence of matrix elements are investigated and compared with HQET predictions. We observe clear signal for the f...

2 8 N ov 2 01 1 D − mesic atoms C . Garćıa - Recio

The anti-D meson self-energy is evaluated self-consistently, using unitarized coupledchannel theory, by computing the in-medium meson-baryon T -matrix in the C = −1, S = 0 sector. The heavy pseudo-scalar and heavy vector mesons, D̄ and D̄, are treated on equal footing as required by heavy quark spin symmetry. Results for energy levels and widths of D mesic atoms in 12C, 40Ca, 118Sn and 208Pb are ...

ar X iv : d g - ga / 9 51 10 05 v 5 2 0 N ov 1 99 5 MODIFIED NOVIKOV – VESELOV EQUATION AND DIFFERENTIAL GEOMETRY OF SURFACES

ar X iv : a st ro - p h / 97 11 24 4 v 1 2 0 N ov 1 99 7 POPULATION SYNTHESIS OF HIGH ENERGY TRANSIENTS RELATIVISTIC BINARY MERGING RATES