Multiplicity dependence for the production of strange hadrons and charged particles in proton-proton collisions

In this contribution, the production rates and the transverse momentum distributions of strange hadrons are reported as a function of charged particle multiplicity. In this analysis, the data collected in proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ALICE detector at the LHC are used. It is found that the production rate of $K_{S}^{0}$, $\Lambda$, $\Xi^{\pm}$, and $\Omega$ increases with multiplicity faster than that for charged particles. The higher the strangeness content of the hadron, the more pronounced is the increase. Moreover, the energy and multiplicity dependence of charged particle production in pp collisions are presented and the results are compared to predictions from Monte Carlo (MC) event generators. It turns out that the average multiplicity density increases steeply with center-of-mass energy for high multiplicity classes.Comment: Proceedings of XXV Cracow EPIPHANY Conference on Advances in Heavy Ion Physics conference, 8-11 January 201

Spring 2009, Experienceing a Trans-Atlantic version of the U.S. election

Economics major Siddharth Prabhakar from Bedford, NH, is spending the year studying at the London School of Economics

From E_{2g} to other modes : Effects of pressure on electron-phonon interaction in MgB_2

We study the effects of pressure on the electron-phonon interaction in MgB_2 using density-functional-based methods. Our results show that the superconductivity in MgB_2 vanishes by 100 GPa, and then reappears at higher pressures. In particular, we find a superconducting transition temperature T_c \~ 2 K for mu*=0.1 at a pressure of 137 GPa.Comment: 4 pages, 6 figures; one figure and discussion on phonon softening adde