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arXiv 1004.4853hep-ph
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在LHC重离子碰撞中与Z^0玻色子产生有关的喷流

Jets associated with Z^0 boson production in heavy-ion collisions at the LHC

R. B. Neufeld

摘要:

大型强子对撞机的重离子计划将为探测热QCD物质,即夸克-胶子等离子体(QGP)提供前所未有的机会。在这些令人兴奋的新探测器中,有一种是与Z^0玻色子或Z^0标记喷流的产生有关的高能部分子。一旦产生,Z^0玻色子基本上不受重离子碰撞中产生的强相互作用介质的影响,因此提供了初始部分子能量和随后的介质诱导部分子能量损失的强大信号。当与理论比较时,对Z^0标记喷流的实验测量将有助于量化QGP的喷流淬灭性质,并区分不同的部分子能量损失形式。在下文中,我讨论了标记喷流相对于领先粒子的优势,并给出了利用Guylassy-Levai-Vitev(GLV)部分子能量损失理论在LHC能量下相对论性重离子碰撞中产生和抑制Z^0标记喷流的初步结果。

英文摘要:

The heavy ion program at the LHC will present unprecedented opportunities to probe hot QCD matter, that is, the quark gluon plasma (QGP). Among these exciting new probes are high energy partons associated with the production of a Z^0 boson, or Z^0 tagged jets. Once produced, Z^0 bosons are essentially unaffected by the strongly interacting medium produced in heavy-ion collisions, and therefore provide a powerful signal of the initial partonic energy and subsequent medium induced partonic energy loss. When compared with theory, experimental measurements of Z^0 tagged jets will help quantify the jet quenching properties of the QGP and discriminate between different partonic energy loss formalisms. In what follows, I discuss the advantages of tagged jets over leading particles, and present preliminary results of the production and suppression of Z^0 tagged jets in relativistic heavy-ion collisions at LHC energies using the Guylassy-Levai-Vitev (GLV) partonic energy loss formalism.

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