Hadronic-loop induced mass shifts in scalar heavy-light mesons
نویسنده
چکیده
We calculate the mass shifts of heavy-light scalar mesons due to hadronic loops under the assumption that these vanish for the groundstate heavy-light mesons. The results show that the masses calculated in quark models can be reduced significantly. We stress that the mass alone is not a signal for a molecular interpretation. Both the resulting mass and the width suggest the observed D∗ 0 state could be a dressed cq̄ state. We give further predictions for the bottom scalar mesons which can be used to test the dressing mechanism.
منابع مشابه
Gauge invariant electromagnetic two-point function for heavy-light quark systems.
A gauge invariant electromagnetic two-point function, crucial to the investigations of the violation of isospin symmetry, is derived for heavy-light quark systems. Thus QED can be consistently introduced into the QCD Sum Rule method, which was not previously possible. The origin of mass differences in isospin multiplets has long been of great interest in nuclear and particle physics as a source...
متن کاملLepton pair production in heavy ion collisions and hadronic phenomenology
We first review the calculations of low invariant mass dilepton production in relativistic heavy ion collisions, using effective hadronic Lagrangians. We go through some of the theoretical techniques used in this kinematical region and we consider some of the appropriate experimental measurements. Moving up to the intermediate invariant mass region, we point out some of the uncertainties that s...
متن کاملHolographic heavy-light mesons from non-Abelian DBI
In the context of gauge/gravity duals with flavor, we examine heavy-light mesons which involve a heavy and a light quark. For this purpose we embed two D7 brane probes at different positions into the gravity background. We establish the non-Abelian Dirac-Born-Infeld (DBI) action for these probes, in which the U(2) matrix describing the embedding is diagonal. The fluctuations of the brane probes...
متن کاملReconciling the Light Scalar Mesons with Breit-Wigner Resonances as well as the Quark Model
Resonances appearing in hadronic scattering processes are described by a two-phase model. In the one phase, scattering products are observed, whereas the other phase describes confinement. A so-called “Resonance-Spectrum Expansion” is derived, containing expressions that resemble Breit-Wigner formulae. This method also provides a straightforward explanation for the origin of the light scalar me...
متن کاملRescattering of Vector Meson Daughters in High Energy Heavy Ion Collisions
We consider the role of hadronic rescattering of daughter kaons on the observed mass spectra from φ meson decays in ultra-relativistic heavy ion collisions. A hadronic cascade code (RQMD v2.4) shows that ∼17% of all φ’s decaying to KK have a rescattered daughter. This significantly affects the reconstructed invariant mass of the pair and shifts the reconstructed φ mesons out of the mass peak. K...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2013