pA Physics Workshop at MIT

17 May 2013, 09:00 → 18 May 2013, 17:00 America/New_York

32-144 (Massachusetts Institute of Technology)

Bolek Wyslouch (Massachusetts Inst. of Technology (US)), George Stephans (Massachusetts Inst. of Technology (US)), Gunther Roland (MIT)

On May 17-18, 2013 MIT is organizing a workshop on proton-nucleus collisions to discuss the latest proton-lead results from CERN and to honor the contributions of Wit Busza to four decades of QCD studies. The detailed scientific program is listed in the timetable

Friday 17 May ¶

1 Welcome to MIT¶

2 The proton-proton and hadron-nucleus ridge: quantum interference of glue or flow ?¶

Speaker: Raju Venugopalan (Brookhaven National Laboratory)

Slides MIT-pA_raju.pdf

3 PHOBOS in the LHC Era¶

Speaker: Peter Alan Steinberg (Brookhaven National Laboratory (US))

Slides Steinberg_pAMIT2013_v0.pdf

10:30 Coffee Break

4 High Multiplicity pp and pA Collisions: Hydrodynamics at its Edge and Explosive Stringy Pomeron¶

High Multiplicity pp and pA Collisions are a place where the macroscopic description (thermodynamics and hydrodynamics) meets with the microscopic one (pomerons and QCD strings). First I discuss what happens with the hydrodynamical predictions as the system size gets smaller and smaller. For simplicity, we don't do it numerically, but analytically using Gubser${}^{\prime }$ s flow. We found that the radial flow is expected to increase, while the elliptic flow decreases, and higher harmonics stronger suppressed. Then we approach the problem from the opposite side, using a string-based Pomeron model. We found that as the intrinsic temperature of the string grows, it approaches the Hagedorn regime and produces a high entropy string ball, amusingly dual to a certain black hole. Furthermore, when the string temperature narrows on the Hagedorn temperature or $T/T_H-1=\mathcal{O}(1/N_c)$, the stringy ball becomes a sQGP ball with non-negligible pressure and hydrodynamical flow.

Speaker: Edward Shuryak (stony brook university)

Slides httpwww.sciencedaily.comreleases201305130516200641.htm.pdf

5 d+Au Hadron Correlations at PHENIX¶

Speaker: Anne Sickles (Brookhaven)

Slides sickles_051713.pdf

6 Dihadron correlations, flow, and jets: quo vadis?¶

Speaker: James Dunlop (Brookhaven National Laboratory)

Slides dunlop_pA_mit_may2013.pdf dunlop_pA_mit_may2013.pptx

13:00 Lunch

7 Explore the high-density QCD medium via particle correlations in pPb collisions at CMS¶

The observation of a long-range, near-side two-particle correlation ("ridge") in very high multiplicity proton-proton and proton-lead collisions has opened up the opportunity of studying collective phenomena in these small systems. High luminosity pPb data were collected by the CMS experiment at the LHC in early 2013. New results of identified particle spectra, two- and multi-particle correlations in pPb collisions from CMS will be presented over a wide event multiplicity and transverse momentum range. A direct comparison of pp, pPb and PbPb systems will be provided. Physics implications, especially in the context of color glass condensate and hydrodynamics models will also be discussed.

Speaker: Wei Li (MIT)

Slides MITWorkshop-pA-WeiLi-05172013v2.pdf

8 Azimuthal anisotropies in lead-lead and proton-lead collisions with the ATLAS detector¶

The presentation will give an overview of measurements of azimuthal anisotropies performed by the ATLAS collaboration using Pb+Pb collisions at sqrt(s_NN)=2.76 TeV and p+Pb collisions at sqrt(s_NN)=5.02 TeV.

Speaker: Barbara Krystyna Wosiek (Polish Academy of Sciences (PL))

Slides Wosiek_MIT.pdf

15:20 Coffee Break

9 Recent pPb results from ALICE (part I)¶

Speaker: Constantinos Loizides (Lawrence Berkeley National Lab. (US))

Slides loizides-mit-052013_v1.pdf

10 Reminiscences of Wit Busza and 41 Years of p+A Physics¶

Speaker: Michael Tannenbaum (Brookhaven National Laboratory (US))

Slides Abstract-Tannenbaum-WitBusza-40Years.pdf Tannenbaum-pAMIT-Busza.pdf

18:30 Dinner at MIT Faculty Club

Saturday 18 May ¶

11 Hadron-Nucleus Interactions: What we have learned.¶

I will describe the early development of ideas and experiments on hadron-nucleus interactions that have led to modern theories of high energy hadronic interactions. These developments proved crucial for basic understanding of ultra-relativistic heavy ion collisions, but perhaps more importantly, radically changed our preconceptions, and led to modern QCD based descriptions of high energy interactions. I will also discuss how recent developments at RHIC and LHC can further test or falsify modern ideas.

Speaker: Larry McLerran (BNL)

Slides busza_mclerran.pdf

12 Recent pPb results from ALICE (part II)¶

Speaker: John William Harris (Yale University (US))

Slides Harris_MIT_Workshop_Talk.pdf

10:20 Coffee Break

13 The Revenge of Wit : Will the Biblical Pillars of AA 2003 be left Standing after the pA of 2013?¶

Looking for the Ag lining in the rubble of p+Pb at LHC and D+Au at RHIC.

Speaker: Miklos Gyulassy (Columbia University)

Slides MGyulassy-MIT051713v2.pdf

14 Stopping, of various kinds¶

Speaker: Brian Cole (Columbia University (US))

Slides paWorkshopMIT_v2.pdf

15 Study of dijet momentum balance and pseudorapidity in pPb collisions¶

Studies of dijet production in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV using the CMS detector are presented. Jets are reconstructed with the anti-kT algorithm with R=0.3, using combined information from tracking and calorimetry. The dijet momentum balance, azimuthal angle correlations and pseudorapidity distributions are studied and compared to results from PYTHIA reference calculations representing pp collisions.

Speaker: Yen-Jie Lee (CERN)

Slides 20130518-MITPA_yenjie-v3.pdf 20130518-MITPA_yenjie-v3.ppt

12:50 Lunch

16 Elementary pseudoscalars, scalars and pA (AA) collisions.¶

Speaker: Witold Krasny (Univ. P. et Marie Curie (Paris VI) (FR))

Slides WIT_fest_MIT_May_final_short_2013_Krasny.pdf

17 pA Physics -- from Fermi Lab Bubble Chamber Data to Future STAR Upgrade at RHIC¶

Speaker: huan huang (UCLA)

Slides Huang-MIT-pA-2013.pdf

15:10 Coffee Break

18 d+Au at PHENIX: Insights on the Cronin Effect, Shadowing and Saturation¶

Speaker: Barbara Jacak (Stony Brook University)

Slides PHENIXdAII.pdf

19 Let's All Be Wit-ty: Learning from p(d)+A Collisions¶

Speaker: Berndt Mueller (Duke University)

Slides BM_MITWorkshop.pdf