Bulletin of the American Physical Society
2015 Fall Meeting of the APS Division of Nuclear Physics
Volume 60, Number 13
Wednesday–Saturday, October 28–31, 2015; Santa Fe, New Mexico
Session 1WC: Workshop: Frontiers in Jets and Heavy Flavor Physics |
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Chair: Christopher Lee, Los Alamos National Laboratory Room: Sweeney Ballroom C |
Wednesday, October 28, 2015 9:00AM - 9:30AM |
1WC.00001: The Higgs in context: the impact of the Run 1 discovery and its shaping of Run 2 at the LHC Invited Speaker: David Lopez Mateos The discovery of the Higgs boson at the LHC in 2012 culminated many decades of work and theoretical speculation. Its sheer discovery has not only ruled out many other theories of EW symmetry breaking, but also given it a mass and a set of properties. The measurement of the values of these properties has wide-ranging implications across different fields in fundamental physics. In this talk, I will discuss some of the most important Run 1 measurements in Higgs physics, and how those measurements have shaped and continue to shape our understanding of high energy physics. In addition, I will survey some of the important measurements and searches that were statistically limited in Run 1, but take renewed importance with the Run 2 dataset. [Preview Abstract] |
Wednesday, October 28, 2015 9:30AM - 10:00AM |
1WC.00002: Theoretical interpretation of jet physics results from RHIC and LHC. Invited Speaker: Grigory Ovanesyan In this talk we overview some of the theoretical approaches used to understand the modification of properties of jets in dense QCD matter that is created in heavy ion collisions. We discuss the predictions coming from different approaches for the jet quenching and their comparison to RHIC and LHC data. Recent developments and progress from applying effective field theory for jets in the medium will be reviewed. [Preview Abstract] |
Wednesday, October 28, 2015 10:00AM - 10:30AM |
1WC.00003: Probing the Quark Gluon Plasma with Jets from RHIC to the LHC Invited Speaker: Megan Connors Jet quenching, the experimental observation of partonic energy loss in the quark gluon plasma (QGP), is one of the major discoveries of the heavy ion program at RHIC. Our understanding of jet quenching and its dependence on temperature is enhanced by the LHC, which has provided a wealth of results with fully reconstructed jets. This talk will explore the current results from RHIC and LHC in an attempt to quantify jet suppression in the QGP and answer the following set of questions. How does temperature relate to jet quenching? How does energy loss depend on pathlength? Where does the lost energy go? How is the fragmentation function modified? What effect does cold nuclear matter have on jet production? [Preview Abstract] |
Wednesday, October 28, 2015 10:30AM - 11:00AM |
1WC.00004: Coffee Break
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Wednesday, October 28, 2015 11:00AM - 11:30AM |
1WC.00005: Production of Heavy Mesons and Quarkonia within Jets Invited Speaker: Thomas Mehen The production of heavy mesons and quarkonia in jets provides new tests of their production mechanisms. The dependence of the cross section on the energy fraction of the heavy particle, $z$, and jet angularity, $\tau_a$, is determined by fragmenting jet functions (FJFs). FJFs are convolutions of fragmentation functions, evolved to the jet energy scale, with perturbatively calculable matching coefficients. We apply this formalism to two-jet events in $e^+ e^-$ collisions with $B$ mesons, and three-jet events with $J/\psi$. For $B$ mesons, we use a phenomenological fragmentation function extracted from $e^+ e^-$ collisions at the scale $2 m_b$, and find the dependence on $z$ and $\tau_a$ is consistent with predictions from Monte Carlo event generators. In the case of quarkonia, the fragmentation functions are calculable in Non-Relativistic QCD (NRQCD) and the $z$ dependence of the cross section can be used to perform an independent extractions of NRQCD long-distance matrix elements. For $J/\psi$ we find reasonable agreement with Monte Carlo for the $\tau_a$ distributions but the $z$ distributions differ significantly. We also define a boost invariant generalization of $\tau_a$ and derive a boost invariant soft function that is necessary for jet cross sections at the LHC. [Preview Abstract] |
Wednesday, October 28, 2015 11:30AM - 12:00PM |
1WC.00006: Prospects for jet measurements with sPHENIX and in the LHC Run 2 Invited Speaker: Dennis Perepelitsa Measurements of fully reconstructed jets have become a sophisticated tool to probe the properties of the quark gluon plasma created in the collisions of ultrarelativistic heavy nuclei at RHIC and the LHC. This talk will discuss the prospects for what future jet measurements can reveal about the physics of jet quenching in the upcoming 5 TeV Pb+Pb collision data-taking at the LHC Run 2 and in 200 GeV Au+Au collisions at RHIC that are enabled by the sPHENIX detector upgrade. [Preview Abstract] |
Wednesday, October 28, 2015 12:00PM - 12:30PM |
1WC.00007: Quarkonia and heavy flavor on the lattice Invited Speaker: Alexei Bazavov I review recent progress in lattice QCD on studying the properties of quarkonia and heavy flavored states in hot deconfined medium. [Preview Abstract] |
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