9 research outputs found
The Productions and Strong Decays of and
We study the productions of first radial excited states () and in exclusive semi-leptonic () decays
by the improved Bethe-Salpeter method. These 2S states can be detected through
their strong decays to ground mesons, where the strong decays are calculated by
the low energy approximation as well as the impulse approximation. Some
channels have ratios of order : , . These channels could be measured by
the current B-factories. For , we also obtain a relative large ratio:
. Although there are discrepancies of the
full decay width between the theoretical predictions of and
experimental results of , the new detected state is very
likely the state.Comment: 22 pages, 5 figures, 5 table
Analysis of the radiative decays among the charmonium states
In this article, we study the radiative decays among the charmonium states
with the heavy quark effective theory, and make predictions for the ratios
among the radiative decay widths of an special multiplet to another multiplet.
The predictions can be confronted with the experimental data in the future and
put additional constraints in identifying the , , charmonium-like
mesons.Comment: 12 pages, revised revisio
Constraint on compactification scale via recently observed baryonic channel and analysis of the transition in SM and UED scenario
We obtain a lower limit on the compactification scale of extra dimension via
comparison of the branching ratio in the baryonic decay channel recently measured by CDF collaboration and our
previous theoretical study. We also use the newly available form factors
calculated via light cone QCD sum rules in full theory to analyze the flavour
changing neutral current process of the in universal extra dimension scenario in the presence of a single extra
compact dimension. We calculate various physical quantities like branching
ratio, forward-backward asymmetry, baryon polarizations and double lepton
polarization asymmetries defining the decay channel under consideration. We
also compare the obtained predictions with those of the standard model.Comment: 32 Pages, 27 Figures and one Tabl
B to strange tensor meson transition in a model with one universal extra dimension
We analyze the semileptonic transition in universal
extra dimension model. In particular, we present the sensitivity of related
observables such as branching ratio, polarization distribution and
forward-backward asymmetry to the compactification factor (1/R) of extra
dimension. The obtained results from extra dimension model show overall a
considerable deviation from the standard model predictions for small values of
the compactification factor. This can be considered as an indication for
existence of extra dimensions.Comment: 10 Pges, 6 Figures and 2 Table
The Belle II Physics Book
We present the physics program of the Belle II experiment, located on the
intensity frontier SuperKEKB collider. Belle II collected its first
collisions in 2018, and is expected to operate for the next decade. It is
anticipated to collect 50/ab of collision data over its lifetime. This book is
the outcome of a joint effort of Belle II collaborators and theorists through
the Belle II theory interface platform (B2TiP), an effort that commenced in
2014. The aim of B2TiP was to elucidate the potential impacts of the Belle II
program, which includes a wide scope of physics topics: B physics, charm, tau,
quarkonium, electroweak precision measurements and dark sector searches. It is
composed of nine working groups (WGs), which are coordinated by teams of
theorist and experimentalists conveners: Semileptonic and leptonic B decays,
Radiative and Electroweak penguins, phi_1 and phi_2 (time-dependent CP
violation) measurements, phi_3 measurements, Charmless hadronic B decay, Charm,
Quarkonium(like), tau and low-multiplicity processes, new physics and global
fit analyses. This book highlights "golden- and silver-channels", i.e. those
that would have the highest potential impact in the field. Theorists
scrutinised the role of those measurements and estimated the respective
theoretical uncertainties, achievable now as well as prospects for the future.
Experimentalists investigated the expected improvements with the large dataset
expected from Belle II, taking into account improved performance from the
upgraded detector.Comment: 689 page
The Belle II Physics Book (Dec, 10.1093/ptep/ptz106, 2019)
In the original version of this manuscript, an error was introduced on pp352. '2.7nb:1.6nb' has been corrected to '2.4nb:1.3nb' in the current online and printed version. doi:10.1093/ptep/ptz106