Conveners
Parallel Session 4
- Robert Harr (Wayne State Universtiy)
Dr
Mark Whitehead
(University of Warwick)
20/05/2015, 08:30
Excited charm states are studied at LHCb both in the pp collision and in decays of B hadrons. The latter method has the advantage of starting from a clean and well defined initial state with known quantum numbers. LHCb presents the observation of new spin-3 mesons decaying to D(*)K and Dπ, as well as many measurements of mass, width and spin of already known mesons.
Mr
Wai Kin Lai
(University of Pittsburgh)
20/05/2015, 08:50
The asymmetry in the forward region production cross section of D± is calculated using the heavy quark recombination mechanism for pp collisions at 7 TeV. By suitable choices of four
nonperturbative parameters, our calculated results can reproduce those obtained at LHCb. We
find A p ∼ −1% when integrated over 2.0 GeV < p T < 18 GeV and 2.2 < η < 4.75, which agrees
with A p = −0.96 ± 0.26 ±...
Dr
Jonathan Harrison
(University of Manchester)
20/05/2015, 09:30
The observation of neutrino oscillations has re-opened the case for searches of lepton-flavour violating decays. We report on recent results and prospects on lepton-flavour violating τ decays.
Ms
Anna Vinokurova
(Budker Institute of Nuclear Physics)
20/05/2015, 09:50
We report a search for B decays to selected final states with the eta_c meson: B -> K eta_c pi+ pi-, B -> K eta_c omega, B -> K eta_c eta and B -> K eta_c pi0. The analysis is based on 772 millions of BB pairs collected at the Upsilon (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We set 90% confidence level upper limits on the branching fractions of the...
Vishal Bhardwaj
(University of South Carolina)
20/05/2015, 10:30
In spite of the fact that the two-body $B$ decays into $\chi_{c2}$ such as $B \to \chi_{c2} K^{(*)}$ are suppressed by the QCD factorization effect, the inclusive $B \to \chi_{c2} X$ branching fraction amounts to one third of the non-suppressed $B \to \chi_{c1} X$ decays because of the decay modes to the multi-body final states. Using a large statistics $\Upsilon(4S)$ data sample corresponding...
Prof.
Milind Purohit
(University of South Carolina)
20/05/2015, 10:50
We present Dalitz plot analyses for the decays of B mesons to D- D0 K+ and D0-bar D0 K+. We report the observation of the D_{s1}^* (2700)^+ resonance in these two channels and obtain measurements of the mass
M(D^*_{s1}(2700)^+) = 2699^{+14}_{−} MeV/c^2 and of the width
Γ(D^*_{s1}(2700)^+) = 127^{+24}_{−1} MeV, including statistical and
systematic uncertainties. In addition, we observe an...
Mr
Vishal Bhardwaj
(University of South Carolina (Belle Collaboration))
20/05/2015, 11:10
We report the first observation of $B^0 \to X(3872) (K^{+}\pi^{-})$ and evidence for $B^+ \to X(3872) (K^{0}\pi^{+})$. We measure the product of branching fractions for the former to be ${\cal B}(B^0 \to X(3872) (K^+ \pi^-)) \times {\cal B}(X(3872) \to J/\psi \pi^+ \pi^-) = (7.9 \pm 1.3(\mbox{stat.})\pm 0.4(\mbox{syst.})) \times 10^{-6}$ and find that $B^{0}\to X(3872) K^{*}(892)^{0}$ does...
Mr
Ayan Paul
(INFN, Sezione di Roma)
20/05/2015, 11:30
The rare semileptonic Bd → K∗l+i− decay has been extensively studied within the Standard Model and beyond. Significant efforts from Lattice QCD groups have reduced theoretical errors in the form-factors to tractable limits in the high q^2 regime while arguments from LCSR can be used for the same in the low q^2 regime. However, hadronic contributions coming primarily from charm loops still...
Rui Wang
(Argonne national laboratory)
20/05/2015, 11:50
We present latest results from the ATLAS experiment on B_c
spectroscopy, including branching fraction measurements of Bc+->
J/psipi and Bc->J/psiDs(*) and observation of the B_c(2S) state.