Thu·Dec 10, 2015Thursday·December 10, 2015

1. 01*

   Measurements of heavy-flavour production in p-Pb collisions with ALICE

   Jeremy Wilkinson (for the ALICE Collaboration)🇩🇪

   The production of open heavy-flavour particles was studied in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV using the ALICE detector. Three separate observables were used: the hadronic decays of D mesons at mid-rapidity, and semileptonic decays of heavy-flavour hadrons to electrons and muons at mid-rapidity and forward rapidity, respectively. The most recent ALICE measurements of the nuclear modification factor, $R_{\mathrm{pPb}}$, of open charm and beauty are reported, along with the centrality and multiplicity dependence of D-meson production in p-Pb collisions.

   nucl-exhep-exNPA(2016)·1 citation
2. 02*

   Penta-quark States with Strangeness, Hidden Charm and Beauty

   Jia-Jun Wu🇦🇺 · B. S. Zou🇨🇳

   The classical quenched quark models with three constituent quarks provide a good description for the baryon spatial ground states, but fail to reproduce the spectrum of baryon excited states. More and more evidences suggest that unquenched effects with multi-quark dynamics are necessary ingredients to solve the problem. Several new hyperon resonances reported recently could fit in the picture of penta-quark states. Based on this picture, some new hyperon excited states were predicted to exist; meanwhile with extension from strangeness to charm and beauty, super-heavy narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm or beauty were predicted to be around 4.3 and 11 GeV, respectively. Recently, two of such $N^{\ast }$ with hidden charm might have been observed by the LHCb experiment. More of those states are expected to be observed in near future. This opens a new window in order to study hadronic dynamics for the multi-quark states.

   ↳ nucl-thhep-phnucl-exJPS Conf.Proc.(2016)·4 citations
3. 03*

   Finite-volume Hamiltonian method for $\pi \pi$ scattering in lattice QCD

   Jia-Jun Wu🇦🇺 · T.-S. Harry Lee🇺🇸 · Derek B. Leinweber🇦🇺 · A. W. Thomas🇦🇺 · Ross D. Young🇦🇺

   Within a formulation of $\pi \pi$ scattering, we investigate the use of the finite-volume Hamiltonian approach to resolving scattering observables from lattice QCD spectra. We consider spectra in the centre-of-mass and moving frames for both S- and P-wave cases. Furthermore, we investigate the multi-channel case. Here we study the use of the Hamiltonian framework as a parametrization that can be fit directly to lattice spectra. Through this method, the hadron properties, such as mass, width and coupling, can be directly extracted from the lattice spectra.

   ↳ hep-latnucl-exnucl-thJPS Conf.Proc.(2016)·5 citations
4. 04*

   Heavy-flavor correlations and multiplicity dependence in pp and p--Pb collisions with ALICE

   Fabio Colamaria (for the ALICE Collaboration)🇮🇹

   The production of heavy quarks in pp collisions at the LHC energies provides a reliable test of perturbative QCD calculations. Comparisons of pp and $\text{pPb}$ measurements of their hadronization products allow us to investigate how cold nuclear matter effects affect the heavy-quark production. We present ALICE measurements of azimuthal correlations of prompt D mesons with charged hadrons in pp collisions at $\text{s}$ = 7 TeV and $\text{pPb}$ collisions at $\text{sNN}$ = 5.02 TeV. We also show the per-event D-meson yields as a function of the charged-particle multiplicity in pp collisions at $\text{s}$ = 7 TeV.

   ↳ hep-exnucl-exNPA(2016)·2 citations
5. 05*

   Faddeev-type calculation of (d,n) transfer reactions in three-body nuclear systems

   A. Deltuva🇱🇹

   Exact Faddeev-type three-body equations are applied to the study of the proton transfer reactions $(d,n)$ in the system consisting of a nuclear core and two nucleons. The integral equations for the three-body transition operators are solved in the momentum-space framework including the Coulomb interaction via the screening and renormalization method. For a weakly bound final nucleus the calculation of the $(d,n)$ reaction is more demanding in terms of the screening radius as compared to the $(d,p)$ reaction. Well converged differential cross section results are obtained for ${}^{7}Be(d,n{)}^{8}B$, ${}^{12}C(d,n{)}^{13}N$, and ${}^{16}O(d,n{)}^{17}F$ reactions. A comparison with the corresponding $(d,p)$ reactions is made. The calculations fail to reproduce the shape of the angular distribution for reactions on ${}^{12}C$ but provide quite successful description for reactions on ${}^{16}O$, especially for the transfer to the ${}^{17}F$ excited state $1/2^{+}$ when using a nonlocal optical potential.

   ↳ nucl-thnucl-exPRC(2015)·7 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.