Higgsstrahlung from R-hadrons

If R hadrons are discovered at the LHC, investigation of their properties will be of paramount importance. One important question is how much of the R-hadron mass is due to electroweak symmetry breaking, i.e. the coupling of the Higgs to R-hadrons. In this paper we show that in models where the Higgs has a sizable coupling to R-hadrons we can readily observe Higgs production in association with a pair of R-hadrons ("Higgsstrahlung"). This process can be used to distinguish between different models of R-hadrons. It may be the discovery mode of the Higgs for low mass Higgs bosons, and provides a low-background Higgs sample to study h to bb.Comment: 9 pages, 3 figures, 2 table

Physics at Large Rapidities in γ∗γ∗→\gamma^*\gamma^* \to Hadrons at LEP2

We compute the order-\as corrections to the total cross section and to jet rates in $\gamma^* \gamma^* \to$ hadrons for the process \epem\to\epem + hadrons. We use a NLO order general-purpose partonic Monte Carlo event generator that allows the computation of a rate differential in the produced leptons and hadrons. We compare our results with the experimental data for \epem\to\epem + hadrons at LEP2.Comment: 5 pages, 1 figure, presented at the LEPTRE meeting, Roma 200

Is X(3872) a possible candidate of hybrid meson

The associate productions of X(3872) and J/\psi in hadron collisions and flavor independence of hadrons in ee^+\to X(3872)+hadrons and the decays X(3872)\to \gamma+hadrons are discussed. It is pointed out X(3872)\to J/\psi+\sigma could be a significant decay channel.Comment: 13 page

Multiquark Hadrons

A number of candidate multiquark hadrons, i.e., particle resonances with substructures that are more complex than the quark-antiquark mesons and three-quark baryons that are prescribed in the textbooks, have recently been observed. In this talk I present: some recent preliminary BESIII results on the near-threshold behavior of sigma(e+e- --> Lambda Lambda-bar) that may or may not be related to multiquark mesons in the light- and strange-quark sectors; results from Belle and LHCb on the electrically charged, charmoniumlike Z(4430)^+ --> pi^+ psi ' resonance that necessarily has a four-quark substructure; and the recent LHCb discovery of the P_c(4380) and P_c(4450) hidden-charm resonances seen as a complex structure in the J/psi p invariant mass distribution for Lambda_b --> K^-J/psi p decays and necessarily have a five-quark substructure and are, therefore, prominent candidates for pentaquark baryons.Comment: 12 pages, 9 figures, summary of a talk presented at the 12th Conference on Hypernuclear and Strange Particle Physics (HYP2015), September 7-12, 2015 Sendai, JAPAN. To appear in the JPS Conference proceeding