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May 5, 2012

Our measurement of medium induced energy loss in QGP using photon-jet events was finally submitted to arXiv:1205.0206 and for publication in Physics Letters B (PLB). This paper has been long awaited since the conception of the heavy ion program at CMS more than 12 years ago (See early CMS Note, p122). It is the first time in the heavy ion field where the medium induced energy loss can be directly studied with a fully unbiased probe (photon).

Also today our dihadron correlations paper got accepted into EPJC!

April 2012

Our paper on the measurement of high transverse momentum charged particle suppression, accepted by the European Physical Journal C (EPJC) in February 2012, was recently published and featured in the cover of the new EPJC issue (March 2012). The figure that was featured in the cover is the main result of the paper showing the suppression of the charged particles over a large transverse momentum range, where a number of theoretical predictions show large variation, in particular at high transverse momentum regime, exhibiting large theoretical uncertainty. Together with other jet quenching related quantities that we have measured, this measurement should help elucidate the mechanism of jet quenching and the properties of the medium produced in heavy-ion collisions at collider energies.

March 2012

We have three new papers about to be published that mark some of the most important Heavy Ion measurements to date, addressing how colored particles lose energy as they traverse the quark gluon plasma created in our relativistic heavy ion collisions. The first measurement we made probes how high energy quarks and gluons fragment as they pass through the hot colored medium and into the vacuum. The second clarifies how these high energy particles lose energy depending of how much medium they pass through. The final paper uses back-to-back pair of photon and quark or gluon to directly probe the absolute amount of energy loss.

February 2012

For the month of November the LHC switched to colliding 2.76 TeV lead nuclei. The heavy ion group was heavily involved in the data taking which resulted in a very rich, high statistics dataset. This year's recorded luminosity is 20 times higher than last year's data giving us access to more precise measurements of known phenomena as well as new measurements and probes available for the first time ever in heavy ion physics.

In a little over two months after the end of data taking we published an updated dijet imbalance paper taking advantage of the full 2011 high statistics dataset. In addition to analyzing new 2011 data we finalized the measurements first shown at Quark Matter and published those in three new papers. The first paper of 2012 is the measurement of isolated photon production in pp and PbPb collisions at 2.76 TeV , where the transverse energy distributions are found to be in good agreement with next-to-leading-order perturbative QCD predictions and the ratio of PbPb to pp isolated photon ET-differential yields is consistent with unity for all PbPb centralities.

Next came the study of dihardon correlations and azimuthal anisotropy harmonics where we show the evolution of short (jet) and long range range correlations with increasing centrality and transverse momentum, as well as the single particle azimuthal harmonics up to fifth order from a Fourier analysis.

The most recent completed paper is the measurement of high transverse momentum charged particle suppression. We find the charged particle yield is suppresed by a factor of 5 compared to pp collisions in the transverse momentum range of 5-10 GeV/c and rises to a factor of 2 in the 40-100 GeV/c range.

Quark Matter

After barely a year of pp and a month of PbPb collisions, several exciting new results emerged from analyses led by our group. From the first 7 TeV pp collisions two summers ago novel correlations were seen in collisions producing the highest number of particles. These were never before seen in pp collisions nor were they predicted by any of the existing Monte Carlo models. This was the first manifestation of unexpected physics at the LHC which has gathered significant interest in both the media and the pp and heavy ion community.

From the start of the PbPb run we saw striking evidence in some of the first event displays of a phenomenon called jet quenching, where a colored quark or gluon passing through the QGP loses a significant fraction of its energy by interacting with the medium. While jet quenching has been observed before, the LHC was the first time you could really see it "with the naked eye". A closer investigation of these types of collisions revealed that we may need to rethink how colored partons really interact with the QGP, since it turns out a quenched jet looks no different than a lower energy jet produced in a vacuum.

These are just a small fraction of the new and exciting discoveries and measurements being performed by the MIT group at the LHC. In less than two months a new PbPb run is coming up with an order of magnitude more collisions than last year, giving access to more precise measurements, rarer events, and potentially new discoveries.

About Us

Our group studies the properties of matter in the hottest and densest conditions attainable in a lab. Our experiment is the Compact Muon Solenoid (CMS) which detects particles produced from high-energy proton-proton (pp) and lead-lead (PbPb) nuclei collisions produced by the Large Hadron Collider (LHC) located near Geneva, Switzerland.

The PbPb collisions are our group's primary focus. When two ultra-relativistic nuclei collide, they deposit a fraction of their energies into the space between them, which results in heating up the vacuum to temperatures around one million times hotter than the center of the sun. That super-hot vacuum is believed to create what is called a Quark Gluon Plasma (QGP), a system of deconfined, strongly interacting, quarks, anti-quarks, and gluons in thermal equilibrium.

This type of matter, believed not to have existed outside particle accelerators since a small fraction of a second after the big bang, has some very interesting properties. Initially this matter was expected to be a weakly interacting gas, which is where the "Plasma" part of the QGP name comes from. However when this matter was first produced and studied at the Relativistic Heavy Ion Collider (RHIC) it came as a big surprise to find out it was much closer to a perfect liquid, with a viscosity to entropy density ratio near the theoretical lowest possible value. Understanding this unique state of matter provides insights to the state and evolution of the universe in its very early stages, as well as other states of matter in condensed matter physics, atomic physics, and black hole physics which share common features.

Administrative Assistant

Anna Maria Convertino

Laboratory for Nuclear Science
24-519
77 Massachusetts Avenue
Cambridge, MA 02139
tel: (617) 253-2391
fax: (617) 253-4360

Professors

	Wit Busza
	Bolek Wyslouch
	Gunther Roland

Research Scientists

	George Stephans
	Christof Roland

Postdocs

	Ivan Cali
	Wei Li
	Yue Shi Lai
	Krisztian Krajczar

Graduate Students

	Siarhei Vaurynovich
	Frank Ma
	Yetkin Yilmaz
	Andre Yoon
	Yongsun Kim
	Dragos Velicanu
	Doga Gulhan
	Alex Barbieri

Recent Papers

2012

• S. Chatrchyan et al. (CMS Collaboration), "Azimuthal anisotropy of charged particles at high transverse momenta in PbPb collisions at sqrt(s[NN]) = 2.76 TeV", arXiv:1204.1850v1

• S. Chatrchyan et al. (CMS Collaboration), "Studies of jet quenching using isolated-photon+jet correlations in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV", arXiv:1205.0206

• S. Chatrchyan et al. (CMS Collaboration), "Jet momentum dependence of jet quenching in PbPb collisions at sqrt(sNN)=2.76 TeV", arXiv:1202.5022

• S. Chatrchyan et al. (CMS Collaboration), "Study of high-pT charged particle suppression in PbPb compared to pp collisions at sqrt(sNN)=2.76 TeV", Eur. Phys. J. C (2012) 72:1945 arXiv:1202.2554

• S. Chatrchyan et al. (CMS Collaboration), "Measurement of isolated photon production in pp and PbPb collisions at 2.76TeV", arXiv:1201.3093 , Physics Letters B, in press (2012)

• S. Chatrchyan et al. (CMS Collaboration), "Centrality dependence of dihadron correlations and azimuthal anisotropy harmonics in PbPb collisions at sqrt(s[NN]) = 2.76 TeV", arXiv:1201.3158

2011

• S. Chatrchyan et al. (CMS Collaboration), "Dependence on pseudorapidity and centrality of charged hadron production in PbPb collisions at a nucleon-nucleon centre-of-mass energy of 2.76 TeV", JHEP 08 (2011) 141. arXiv:1107.4800

• S. Chatrchyan et al. (CMS Collaboration), "Charged particle transverse momentum spectra in pp collisions at = 0.9 and 7 TeV", JHEP 08 (2011) 086. arXiv:1104.3547

• S. Chatrchyan et al. (CMS Collaboration), "Long-range and short-range dihadron angular correlations in central PbPb collisions at a nucleon-nucleon center of mass energy of 2.76 TeV", JHEP 07 (2011) 076. arxiv.1105.2438

• S. Chatrchyan et al. (CMS Collaboration), "Observation and studies of jet quenching in PbPb collisions at 2.76 TeV" Phys. Rev. C 84, 024906 (2011) arxiv.1102.1957

• Khachatryan, V. et al. (CMS Collaboration), “Charged particle multiplicities in pp interactions at = 0.9, 2.36, and 7 TeV,” JHEP 1101, 079. arxiv.1011.5531

• Khachatryan, V. et al. (CMS Collaboration), “Measurement of the Isolated Prompt Photon Production Cross Section in pp Collisions at = 7 TeV,” Phys. Rev. Lett. 106, 082001. arxiv.1012.0799

• Alver, B. et al. (PHOBOS Collab.), “Phobos results on charged particle multiplicity and pseudorapidity distributions in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultra-relativistic energies”, Phys. Rev. C 83, 024913. arxiv:1011.1940

• Busza, W., “Extended Longitudinal Scaling: Direct Evidence of Saturation”, Nucl. Phys. A854, 57. arXiv:1102.3921

2010

• Khachatryan, V. et al. (CMS Collaboration), “Transverse momentum and pseudorapidity distributions of charged hadrons in pp collisions at = 0.9 and 2.36 TeV”, JHEP 02, 041 arXiv:1002.0621

• Khachatryan, V. et al. (CMS Collaboration), “Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions at the LHC,” JHEP 1009, 091. arXiv:1009.4122

• Khachatryan, V. et al. (CMS Collaboration), “Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at = 7 TeV,” Phys. Rev. Lett. 105, 022002. arXiv:1005.3299

• Alver, B. et al. (PHOBOS Collab.), “High transverse momentum triggered correlations over a large pseudorapidity acceptance in Au+Au collisions at = 200 GeV”, Phys. Rev. Lett. 104, 062301. arXiv:0903.2811

• Alver, B. et al. (PHOBOS Collab.), “System size dependence of cluster properties from two-particle angular correlations in Cu+Cu and Au+Au collisions at = 200 GeV”, Phys. Rev. C 81, 024904. arXiv:0812.1172

• Alver, B. et al. (PHOBOS Collab.), “Event-by-event fluctuations of azimuthal particle anisotropy in Au+Au collisions at = 200 GeV”, Phys. Rev. Lett. 104 , 142301. arXiv:nucl-ex/0702036

• Alver, B. et al. (PHOBOS Collab.), “Non-flow correlations and elliptic flow fluctuations in gold-gold collisions at =200 GeV”, Phys. Rev. C 81, 034915. arXiv:1002.0534

• Alver, B. and Roland, G., “Collision geometry fluctuations and triangular flow in heavy-ion collisions”, Phys. Rev. C 81, 054905. arXiv:1003.0194

• Arleo F., d’Enterria, D., and Yoon, A.S., “Single-inclusive production of large-pT charged particles in hadronic collisions at TeV energies and perturbative QCD predictions”, JHEP 1006, 035 (2010) arXiv:1003.2963

• Yoon, A.S., Wenger, E., and Roland, G., “Convoluting jet spectra with fragmentation functions: a cross-check of the charged particle pT spectrum”, arXiv:1003.5928

• Abelev, B. I. et al., (STAR Collab.) “Identified particle production, azimuthal anisotropy, and interferometry measurements in Au+Au collisions at = 9.2 GeV”, Phys. Rev. C 81, 024911. arXiv:0909.4131

Recent Talks

2012

• Wyslouch, B., “High-pt physics in Heavy Ion collisions”, ICFP2012: First International Conference on New Frontiers in Physics, 10-16 Jun 2012, Kolymbari (Greece)

• Wyslouch, B., “Studies of hot and dense matter at the Large Hadron Collider with CMS”, HEP seminar Caltech, May 2012, Pasadena, CA

• Wyslouch, B., “Study of Heavy Ion collisions with Hard Probes”, Blois2012: 24th Rencontres de Blois on "Particle Physics and Cosmology", 27 May-1 Jun 2012, Blois (France)

• Wyslouch, B., “Studies of hot and dense matter at the Large Hadron Collider”, Seminar at the Institute of Photonic Sciences, April 2012, Barcelona, Spain

• Yilmaz, Y., “Hard Probes in Heavy Ion Collisions with CMS”, Moriond/QCD: Rencontres de Moriond on "QCD and High Energy Interactions" , 10-17 Mar 2012, La Thuile, AO, Italy

• Yilmaz, Y., “Measurement of dijet properties and jet-track correlations in PbPb collisions at sqrt(s)=2.76TeV with CMS”, 7HighpT: 7th international workshop on High-pT Physics at LHC, 26-27 Mar 2012, Frankfurt am Main, Germany

• Roland, G., “Study of jet-quenching using charged hadron R_AA and v_2 measurements at high pT in PbPb collisions with CMS”, 7HighpT: 7th international workshop on High-pT Physics at LHC, 26-27 Mar 2012, Frankfurt am Main, Germany

• Lai, Y.S., “Measurement of isolated photon production in PbPb collisions at 2.76TeV with CMS”, 7HighpT: 7th international workshop on High-pT Physics at LHC, 26-27 Mar 2012, Frankfurt am Main, Germany

• Roland, C., “Measurement of dijet fragmentation functions in PbPb collisions at sqrt(s)=2.76TeV with CMS”, 7HighpT: 7th international workshop on High-pT Physics at LHC, 26-27 Mar 2012, Frankfurt am Main, Germany

• Lee, Y.J., “Little Big-Bang: Relativistic Heavy Ion Collision”, invited colloquium, NCU, Jhongli, Taiwan , January 2012

2011

• Busza, W., “Initial Results from the LHC”, American Physical Society Meeting, Anaheim, CA May 2011.

• Kim, Y., "Photons in CMS" High-pT Probes of High-Density QCD at the LHC, Ecole Polytechnique, Palaiseau, Ile-de-France, France, June 2011.

• Kim, Y., "Measurement of Inclusive Isolated Photons in PbPb Collisions with CMS”, Quark Matter Annecy, France, May 2011.

• Lee, Y.J., "Overview of CMS results from heavy-ion collisions", Invited talk, EPS-HEP 2011: EPS High Energy Physics Conference, Grenoble, Isère, France, July 2011.

• Lee, Y.J., "Transverse Momentum and Pseudorapidity Distributions of Charged Hadrons at CMS", Selected talk, PLHC2010: Physics at the LHC 2010, DESY, Hamburg, Germany, June 2011.

• Lee, Y.J., "Heavy-ion Physics from the CMS experiment", Invited talk, PPP9: Ninth Particle Physics Phenomenology Workshop, Chungli, Taiwan, June 2011.

• Lee, Y.J., "Nuclear modification factors from the CMS experiment", Plenary talk, Quark Matter Annecy, France, May 2011.

• Li, W., "Correlations and fluctuations measured by the CMS experiment in pp and PbPb collisions”, Quark Matter Annecy, France, May 2011.

• Li, W., "High-pT particle correlations in CMS" High-pT Probes of High-Density QCD at the LHC, Ecole Polytechnique, Palaiseau, Ile-de-France, France, June 2011.

• Ma, F., "Jet measurements by the CMS experiment in pp and PbPb collisions", Invited talk, EPS-HEP 2011: EPS High Energy Physics Conference, Grenoble, Isère, France, July 2011.

• Ma, F., "Studies of Jet Quenching in HI Collisions at CMS", XLVIth Rencontres de Moriond on QCD and High Energy Interaction, La Thuile, March 2011.

• Roland, C., "Results on hard probes in HI collisions at the LHC", Invited talk at LHC Physics Center at CERN, Geneva, Switzerland, March 2011.

• Roland, C., "Jet measurements by the CMS experiment in pp and PbPb collisions”, Quark Matter Annecy, France, May 2011.

• Roland, G., "Initial state fluctuations, 2-particle correlations and hydrodynamic flow", invited talk, RIKEN-BNL workshop, BNL, Feb 2011

• Roland, G., "The Quark-Gluon Liquid at LHC", colloquium, Rutgers University, March 2011

• Roland, G., "LHC Experiments", eview talk, PPP9 summer school, Chunglu, Taiwan, June 2011

• Roland, G., "Studies of jets and jet quenching with the CMS experiment", invited talk, Jet Symposium, Hangzhou, China, July 2011

• Stephans, G., "Studies of Jet Quenching in PbPB Collisions at sqrt(s_NN)=2.76 TeV", 19th Particles & Nuclei International Conference PANIC11, Cambridge, MA, July 2011.

• Stephans, G., "Studies of Jet Quenching in PbPb Collisions at CMS", American Physical Society, Division of Particles & Fields Meeting, Providence, RI, August 2011.

• Velicanu, D.A., "Status of 'the ridge' in CMS", MBUEWG, CERN, France, June 2011.

• Velicanu, D.A., "Observation of a ridge correlation structure in high multiplicity pp collisions with CMS”, Quark Matter Annecy, France, May 2011.

• Wenger, E., “Jet physics in p+p and Pb+Pb collisions with the CMS experiment”, Winter Workshop on Nuclear Dynamics, Winter Park, CO, February 2011.

• Wenger, E., “Direct Observation of Jet Quenching in PbPb Collisions at CMS”, Fermilab Seminar, Fermilab National Lab, Batavia, IL, January 2011.

• Wyslouch, B., “The heavy ions programme of the CMS experiment”, EPIC@LHC: International Workshop on Early Physics with heavy-Ion Collisions at the LHC, 6-8 Jul 2011, Bari, BA (Italy)

• Wyslouch, B., “Results from heavy ion collisions at LHC” Physics Colloquium, DESY, Hamburg and Berlin, Germany, June 2011.

• Wyslouch, B., “Heavy Ion Physics with CMS” at Kraków -Warsaw Workshop on LHC, Kraków, Poland, Feb 2011.

• Wyslouch, B., “Heavy Ion Physics at the LHC”, Physics Colloquium at University of Minnesota, Minneapolis, May 2011.

• Wyslouch, B., “Physics with heavy ion collisions at the LHC”, MIT LNS high energy and nuclear physics colloquium, May 2011.

• Wyslouch, B., “Overview of the experimental results by the CMS Collaboration” at Quark Matter, Annecy, France, May 2011.

• Wyslouch, B., “Results from Heavy Ions Collisions at the LHC”, Seminar at DESY, Hamburg and Berlin, Germany, June 2011.

• Yilmaz, Y., “Dijet Fragmentation Functions Measured in PbPb Collisions with CMS”, Quark Matter Annecy, France, May 2011.

• Yoon, A., "Centrality and transverse momentum dependence of the nuclear modification of charged particle spectra in PbPb collisions at 2.76 TeV from CMS”, Quark Matter Annecy, France, May 2011.

• Yoon, A., "RAA from CMS" High-pT Probes of High-Density QCD at the LHC, Ecole Polytechnique, Palaiseau, Ile-de-France, France, June 2011.

2010

• Alver, B., “Collision geometry fluctuations, triangular flow and two-particle correlations in heavy ion collisions”, Seminar in Hadronic Physics, McGill University, Montreal, Quebec, Canada, October 2010.

• Alver, B., “Fluctuations of Initial Collision Geometry and Triangular Flow in Heavy Ion Collisions”, RHIC & AGS Annual Users' Meeting, Brookhaven National Laboratory, Upton, NY, June 2010.

• Alver, B., “Initial geometry fluctuations and triangular flow”, Workshop on “Quantifying the Properties of Hot QCD Matter”, University of Washington, Institute for Theoretical Physics, Seattle, WA, June 2010.

• Alver, B., “Collision Geometry Fluctuations and Triangular Flow”, Workshop on “Saturation, the Color Glass Condensate and Glasma”, Brookhaven National Laboratory, Upton, NY, May 2010.

• Alver, B., “Initial geometry fluctuations and triangular flow” Paris Area Heavy Ion Physics Seminar, Institut de Physique Nucleaire, Orsay, France, May 2010.

• Alver, B., “Collision geometry fluctuations and triangular flow in heavy-ion collisions” Nuclear Theory Seminar, Brookhaven National Laboratory, Upton, NY, April 2010.

• Busza, W., “Extended Longitudinal Scaling: Direct Evidence of Saturation, What have we learnt from RHIC?”, Workshop on “Saturation, the Color Glass Condensate and Glasma”, BNL, Upton, NY, May 2010.

• Lee, Y. J., “Transverse Momentum and Pseudorapidity Distributions of Charged Hadrons at CMS”, Physics at the LHC 2010, DESY, Hamburg, Germany, Jun 2010.

• Li, W., "Long-range correlations in PHOBOS", Workshop on Saturation, the Color Glass Condensate and Glasma, BNL, May 2010.

• Li, W., "CMS Cluster Analysis in MinBias Events", Workshop on Minimum Bias and Underlying Event, CERN, May 2010.

• Li, W., " Charged Particle multiplicities in inelastic interactions", Workshop on implications of First LHC Data, MIT, Cambridge, USA, August 2010.

• Li, W., "Unexpected results from the LHC", LHC lunch time seminar, MIT, October 2010.

• Li, W., "Observation of Long-range Near-side Angular Correlations in Proton-Proton Collisions at the LHC", Physics Colloquium, BNL, October 2010.

• Li, W., "Observation of Long-range Near-side Angular Correlations in Proton-Proton Collisions at the LHC", High Energy Physics Seminar, University of Illinois, Chicago, November 2010.

• Li, W., "Properties of non pQCD at the LHC", Conference on LHC first data, University of Michigan, December 2010.

• Roland, C., “Physics Results Using First CMS Collider Data", XLVth Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, March 2010

• Roland, G., “First Results from CMS @ LHC”, LNS colloquium, MIT, March 2010.

• Wenger, E., “Minimum Bias Experimental Results from CMS”, Minimum Bias and Underlying Event Workshop, CERN, Switzerland, March 2010.

• Wenger, E., “First Results from CMS and Perspectives for Heavy Ions”, Invited Talk at Heavy Ion Collision 2010, theory workshop, September 2010, CERN, Switzerland.

• Wenger, E., “Early Measurements of Bulk Observables in CMS”, Invited Talk at Hot Quarks 2010, La Londe les Maures, France, June 2010.

• Wyslouch, B., CERN/EP: CERN EP Seminar, CERN, Geneva, Switzerland, Dec 2010.

• Wyslouch, B., “Heavy Ion Physics with the CMS experiment at the LHC”, Seminar, NIKHEF, Amsterdam, The Netherlands, August 2010.

2009

• Wyslouch, B., “Quark Matter and Heavy Ion Collisions: Convener's Review”, CIPANP 2009: 10th Conference on the Intersections of Particle and Nuclear Physics, 26-31 May 2009, San Diego, CA (United States)

• Wyslouch, B., “CMS Experiment at LHC: Detector Status and Physics Capabilities in Heavy Ion Collisions”, WW25: 25th Winter Workshop on Nuclear Dynamics, 1-8 Feb 2009, Big Sky (United States)

2008

• Wyslouch, B., “CMS Experiment at LHC: Detector Status and Physics Capabilities in Heavy Ion Collisions”, Nuclear Physics Seminar, 5 Aug 2008, BNL, Upton, NY (United States)

• Wyslouch, B., “Low-p_T QCD at CMS”, QCD08: 14th International QCD Conference, 7-12 Jul 2008, Montpellier (France)

2006

• Wyslouch, B., “Quarkonia in CMS”, Physics at LHC, 3-8 Jul 2006, Kraków (Poland)

PhD Theses from our group

• Lee, Yen-Jie, "Measurement of the charged-hadron multiplicity in proton-proton collisions at LHC with the CMS detector" 2011. pdf

• Alver, Burak Han, "Measurement of non-flow correlations and elliptic flow fluctuations in Au+Au collisions at RHIC" 2010. pdf

• Li, Wei, "Clustering phenomena from two-particle angular correlations in proton-proton and heavy ion collisions" 2009. pdf

• Wenger, Edward, "Studies of high transverse momentum phenomena in heavy ion collisions using the PHOBOS detector" 2008. pdf

Classic Papers in Heavy Ion Physics

The Bjorken's 1983 PRD paper:

http://prd.aps.org/abstract/PRD/v27/i1/p140_1

First papers predicting a strong enhancement of strangeness in HI/QGP:

http://prl.aps.org/abstract/PRL/v48/i16/p1066_1

http://www.sciencedirect.com/science/article/pii/0375947484905517

http://prl.aps.org/abstract/PRL/v56/i21/p2334_1

http://www.sciencedirect.com/science/article/pii/0370157386900967

Classic paper about phi mesons in QGP:

http://prl.aps.org/abstract/PRL/v54/i11/p1122_1

Ollitrault's flow paper:

http://prd.aps.org/abstract/PRD/v46/i1/p229_1

Flow Fourier decomposition:

http://www.springerlink.com/content/1fjt6bby9gge7rd7/

The first paper were QGP was introduced at high temperatures:

http://www.sciencedirect.com/science/article/pii/0370269375901586

The first papers, where liberated states of quarks are introduced at high densities:

(no link): Ivanenko, D. D. and Kurdgelaidze, D. F., Astrophysics 1, v.6, 1965 (in Russian)

http://www.nature.com/nature/journal/v209/n5021/abs/209389a0.html

http://www.springerlink.com/content/x743755j17064478/

http://www.springerlink.com/content/r70724754r72415t/

The paper in which the term QGP was first introduced:

http://www.sciencedirect.com/science/article/pii/0370157380901052

The Satz-Matsui paper:

http://www.sciencedirect.com/science/article/pii/0370269386914048

The PHOBOS multiplicity paper:

http://prl.aps.org/abstract/PRL/v85/i15/p3100_1

The first CFL phase paper:

http://www.sciencedirect.com/science/article/pii/S0550321398006683

Quarkyonic matter prediction:

http://www.sciencedirect.com/science/article/pii/S0375947407006823

First lattice QCD papers:

http://prd.aps.org/abstract/PRD/v10/i8/p2445_1

http://prd.aps.org/abstract/PRD/v11/i2/p395_1

The STAR flow paper:

http://prl.aps.org/abstract/PRL/v86/i3/p402_1

The PHENIX Raa paper:

http://prl.aps.org/abstract/PRL/v88/i2/e022301

The participant eccentricity paper:

http://prl.aps.org/abstract/PRL/v98/i24/e242302

The triangular flow paper:

http://prc.aps.org/abstract/PRC/v81/i5/e054905

Links

CMS Heavy Ion Public Results

CMS Papers Timeline

Physics Dept.

LNS

CMS

CERN

TWiki

Phobos Publications

Indico - MIT Group Meetings

Indico - CMS HIN Meetings