Nuclear Physics & RIKEN Theory Seminar

"Is energy-momentum conservation masquerading as more interesting physics? How different are p+p and Au+Au collisions, really?"

Presented by Michael Lisa, Ohio State University

Friday, August 8, 2008, 2:00 pm — Small Seminar Room, Bldg. 510

Transverse momentum distributions and femtoscopic measurements in ultra-relativstic heavy ion collisions carry considerable information about the dynamics of the hot system produced. Direct comparison with the same spectra from p+p collisions has proven invaluable to identify novel features associated with the larger system, in particular, the ``jet quenching'' at high momentum and apparently much stronger collective flow dominating the spectral shape at low momentum. I will discuss possible hazards of ignoring conservation laws in the comparison of high- and low-multiplicity final states. I will argue that the effects of energy and momentum conservation actually dominate many of the observed systematics, and that p+p collisions may be much more similar to heavy ion collisions than generally thought. Much of the material for this talk may be found at: Z. Chajecki and M.A. Lisa arXiv:0803.0022 [nucl-th] Z. Chajecki and M.A. Lisa arXiv:0807.3569 [nucl-th]

Hosted by: Harmen Warringa

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