Ja n 20 04 Balance functions in a thermal model with resonances ⋆
نویسندگان
چکیده
The π+π− balance function in rapidity is computed in a thermal model with resonances. It is found that the correlations from the neutral-resonance decays are important, yielding about a half of the total contribution, which in general consist of resonance and non-resonance parts. The model yields the pionic balance function a few per cent wider that what follows from the recent data for the Au+Au collisions at √ sNN = 130 GeV.
منابع مشابه
ar X iv : p hy si cs / 0 60 10 79 v 1 1 1 Ja n 20 06 Comparison of 87 Rb N - resonances for D 1 and D 2 transitions
We report an experimental comparison of three-photon-absorption resonances (known as “N resonances”) for the D1 and D2 optical transitions of thermal Rb vapor. We find that the D2 N -resonance has better contrast, a broader linewidth, and a more symmetric lineshape than the D1 N -resonance. Taken together, these factors imply superior performance for frequency standards operating on alkali D2 N...
متن کامل- th / 0 31 00 62 v 1 2 4 O ct 2 00 3 Balance functions in a thermal model with resonances ⋆
The π+π− balance function in rapidity is computed in a thermal model with resonances. It is found that the correlations from the neutral-resonance decays are important, yielding about a half of the total contribution, which in general consist of resonance and non-resonance parts. The model results are confronted with the recent data for the Au+Au collisions at √ sNN = 130 GeV and a good agreeme...
متن کاملar X iv : h ep - p h / 04 12 14 0 v 3 2 5 Ja n 20 05 Charm meson resonances in D → P l ν decays
Motivated by recent experimental results we reconsider semileptonic D → P ℓν ℓ decays within a model which combines heavy quark symmetry and properties of the chiral Lagrangian. We include excited charm meson states, some of them recently observed, in our Lagrangian and determine their impact on the charm meson semileptonic form factors. We find that the inclusion of excited charm meson states ...
متن کاملThermal Conductivity of Cu2O-TiO2 Composite -Nanofluid Based on Maxwell model
Nanofluids are colloidal suspension of nanoparticles in a base fluid and have superior thermal properties in comparison to their base fluids. Novel properties of nanofluids are yet to be explored to the highest potential. Currently extensive investigation has been done on thermal conductivity of metallic and oxide...
متن کاملar X iv : n uc l - th / 0 50 10 22 v 1 1 0 Ja n 20 05 Resonances from Baryon decuplet - Meson octet interaction
The s-wave interactions of the baryon decuplet with the octet of pseudoscalar mesons is studied in a unitarized coupled channel approach. We obtain a fair agreement for mass and width of several 3 2 − resonances. In particular, the Ξ(1820), the Λ(1520) and the Σ(1670) states are well reproduced. Other resonances are predicted and also the couplings of the observed resonances to the various chan...
متن کامل