The 2nd International Conference on the Initial Stages in High-Energy Nuclear Collisions

Session

Cabernet-1

5 Dec 2014, 10:40

Embassy Suites Napa Valley, California

Conveners

Cabernet-1

• Xin Dong (Lawrence Berkeley National Lab)

123. Charmonium production in p-Pb collisions with ALICE at the LHC

Mr Michael Andreas Winn (Ruprecht-Karls-Universitaet Heidelberg (DE))

05/12/2014, 10:40

"Charmonia are considered as a key observable for deconfinement in nucleus-nucleus (A-A) collisions at LHC energies. Measurements in proton-nucleus (p-A) collisions provide crucial information to study nuclear effects which are also present in the absence of the Quark-Gluon Plasma. Charmonium production has been measured by ALICE in proton-proton, p-Pb and Pb-Pb collisions down to p_T =...

124. Bottomonium production at forward rapidity with ALICE at the LHC

Massimiliano Marchisone (Turin University and INFN)

05/12/2014, 11:00

"The measurement in hadron collisions of bottomonia ($b\bar{b}$ mesons) is a powerful tool to investigate their properties and those of the surrounding medium. According to the color-screening model, bottomonia give important information about the deconfined medium called Quark-Gluon Plasma (QGP) that is produced in ultrarelativistic heavy-ion collisions. On the other hand, cold nuclear...

85. Charmonium photoproduction in ultra-peripheral Pb-Pb collisions with ALICE at the LHC

Daniele De Gruttola (Universita e INFN (IT))

05/12/2014, 11:20

"The photoproduction of vector mesons in Ultra-Peripheral Collisions (UPC) is a powerful tool to probe the nuclear gluon distribution in the nucleus, for which there is considerable uncertainty in the low-x region. The first measurements of coherent photoproduced J/ψ and ψ(2S) in Pb-Pb collisions at √sNN = 2.76 TeV, performed with the ALICE detector, are presented. The J/ψ is identified via...

101. Results from ultra-peripheral collisions from CMS

Pat Kenny (University of Kansas (US))

05/12/2014, 11:40

The nature of the initial state can be studied in photon-nucleus collisions at the LHC. Ultra-peripheral collisions (UPCs) of heavy ions involve long range electromagnetic interactions at impact parameters larger than twice the nuclear radius. At TeV energies, the strong electromagnetic field due to the coherent action of the Z=82 proton charges generates a large flux of photons, which can be...

98. Weak boson results from CMS

Manuel Calderon De La Barca Sanchez (University of California Davis (US))

05/12/2014, 12:00

The weak bosons, Z and W, do not participate in the strong interaction, and thus constitute clean probes of the initial state of nuclear collisions. Detected trough their leptonic decay channels, they provide constraints on the nuclear parton distribution functions (PDF). In particular the W boson proves a unique constraint on the sea quark distributions. We report on CMS measurements of weak...

129. Recent results on elector-weak probes in lead-lead and proton-lead collisions from the ATLAS Detector at the LHC

Alexander Milov (Weizmann Institute of Science (IL))

05/12/2014, 12:20

Photons and weak bosons do not interact strongly with the dense and hot medium formed in the nuclei collisions, thus should be sensitive to the nuclear modification of parton distribution functions (nPDFs). In particular, proton-lead collisions provide an excellent opportunity to test nPDFs in a less dense environment than lead-lead. The ATLAS detector, optimized for searching new physics ...

94. Direct virtual photon production in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV at STAR

CHI YANG (USTC)

05/12/2014, 12:40

One important physics goal of ultra-relativistic heavy-ion collisions is to study the fundamental properties of a hot, dense medium created in these collisions. This medium is expected to emit thermal radiation in the form of direct photons and dileptons. Once produced, photons and leptons traverse the strongly interacting medium with minimal interactions. The fully installed...