11-13 January 2016
US/Mountain timezone
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Contribution List

Displaying 36 contributions out of 36
Session: Session 11
Some of the most arduous and error-prone aspects of precision resummed calculations are related to the partonic hard process, having nothing to do with the resummation. In particular, interfacing to parton-distribution functions, combining various channels, and performing the phase space integration can be limiting factors in completing calculations. Conveniently, however, most of these tasks are ... More
Presented by Dr. Marat FREYTSIS on 13 Jan 2016 at 2:00 PM
Session: Session 5
In relativistic heavy ion collisions a hot and dense medium of unscreened color charges is produced. Jets arising from hard scattering processes occurring in the early stages of the collisions become attenuated as they propagate through this medium, and thus jets are a crucial tool in characterizing the medium's properties. Connecting experimental results to a theoretical picture and quantitative ... More
Presented by Dr. Aaron ANGERAMI on 12 Jan 2016 at 9:00 AM
Session: Session 1
In this talk, we review the latest developments of jet finding techniques and corresponding experimental results from LHC Experiments.
Presented by Sevil SALUR on 11 Jan 2016 at 9:10 AM
Session: Session 2
We study the factorization of the diet cross section in electron positron annihilation using the generalized exclusive jet algorithm which includes the cone-type, the JADE, the kt, the anti-kt and the Cambridge/Aachen jet algorithms as special cases. In order to prove the characteristics of the jet algorithms in a unified way, we consider the generalized kt jet algorithm with an arbitrary weight o ... More
Presented by Inchol KIM on 11 Jan 2016 at 11:30 AM
Session: Session 9
We use the framework of Soft-Collinear Effective Theory (SCET) to study the production of B and J/psi mesons in jets. We focus on jets where the angularity, a class of jet-shape variable, of one of the jets is measured. Using factorization formulae provided by SCET, we calculate the next-to-leading-log-prime (NLL’) resummed cross-section for e+e- → 2 jets where one of the jets contains a B mes ... More
Presented by Reginald BAIN on 13 Jan 2016 at 10:00 AM
Session: Session 10
Because of their large masses and long lifetimes, heavy quarks are dominantly produced from initial hard parton scattering processes and can experience the whole evolution of the Quark Gluon Plasma (QGP) created in high-energy heavy-ion collisions. For this reason, heavy quarks have been suggested as excellent probes of the properties of the QGP. Theoretical models based on existing data predict t ... More
Presented by Mr. Zachariah MILLER on 13 Jan 2016 at 11:30 AM
Session: Session 9
Forward particle production can be observed to large Feynman $x$ at $\sqrt{s}>$60 GeV in colliding beam experiments at RHIC. Large transverse single spin asymmetries (SSA) have been measured for pion production at large $x_F$ and to surprisingly large transverse momentum values. As an intended prelude for SSA measurements of forward Drell-Yan production of low-mass dileptons (AnDY), we measured c ... More
Presented by Dr. leslie BLAND on 13 Jan 2016 at 9:00 AM
Session: Session 2
We present the calculation of the unmeasured soft function necessary for the study of dijet production in pp collisions. The calculation is independent of the choice of the jet (sub-)structure measurement. While our results are valid for all 2 -> 2 channels, we compute explicitly for the qq -> qq channel the color-flow matrices and plot the NNLL resummed differential cross section. A boost invaria ... More
Presented by Mr. Yiannis MAKRIS on 11 Jan 2016 at 11:00 AM
Session: Session 11
Presented by Dr. David MORRISON on 13 Jan 2016 at 3:00 PM
Session: Session 5
For more than a decade, heavy-ion collisions have allowed us to study the Quark Gluon Plasma (QGP) created in these collisions, where relevant degrees of freedom are partonic rather than hadronic. In the initial stage of the collision, high energy nucleon collisions produce high transverse momentum partons, which fragment and hadronize into a spray of particles that we call a jet. Jets are a well ... More
Presented by Prof. Rosi REED on 12 Jan 2016 at 10:00 AM
Session: Session 9
Hadronic matrix elements with longitudinal and transverse dependence play an important role in a wide variety of QCD related phenomena. Among other things, such quantities are required to address certain issues in hadronic spin physics, to make predictions for the transverse momentum dependent spectrum of the Higgs boson production at the LHC, to obtain three-dimensional hadronic tomography and f ... More
Presented by Dr. Ahmad IDILBI
Session: Session 3
One of the most important testing ground for the theoretical understanding of jet quenching is the parton flavor dependence of the in-medium energy loss and CMS has excellent capability to study heavy quark jets and mesons in heavy ion collisions. In this summary talk, studies of non-prompt J/psi, B and D meson production in pp, pPb and PbPb collisions at various of collision energies are summariz ... More
Presented by Prof. Yen-Jie LEE on 11 Jan 2016 at 2:30 PM
Session: Session 10
The interactions of heavy quarks in medium are believed to encode valuable information about the properties of the quark–gluon plasma (QGP). Recent experimental results suggest a strong coupling between heavy quarks and the QGP medium which require non-perturbative interactions. Current lattice-QCD provide valuable information but are not easily analytically continued to real-time physics. This ... More
Presented by Shuai LIU on 13 Jan 2016 at 11:00 AM
Session: Session 7
LHCb provides unique kinematical coverage in the forward region at the LHC. I will discuss heavy flavor production measurements made by LHCb in Run 1, along with prospects for Runs 2 and 3. Topics will include charm and beauty cross sections; vector boson + heavy flavor jets; and production of top, quarkonia, di-b-jet, and di-c-jet.
Presented by Mike WILLIAMS on 12 Jan 2016 at 2:30 PM
Session: Session 11
Presented by Prof. Gunther ROLAND on 13 Jan 2016 at 2:30 PM
Session: Session 5
Recently an effective field theory for jets in the dense QCD matter has been developed and applied for jet quenching phenomenology. This Soft Collinear Effective Theory with Glauber gluons allows for calculation of medium-induced splitting kernels beyond the approximations made in the traditional energy loss. In this talk we review such results and their incorporation in the QCD evolution equation ... More
Presented by Dr. Grigory OVANESYAN on 12 Jan 2016 at 9:30 AM
Session: Session 6
Jet substructures and cross sections provide crucial information about the jet formation mechanism. Their precise calculations are necessary for the understanding of the properties of the medium jets pass through. The calculations involve the resummation of large logarithms which can be performed using renormalization group techniques in soft-collinear effective theory. In heavy ion collisions, ... More
Presented by Dr. Yang-Ting CHIEN on 12 Jan 2016 at 11:00 AM
Session: Session 8
Employing publicly available Monte Carlo models of jet modification in a partonic medium, we study jet-hadron correlations in heavy ion collisions at RHIC and LHC energies. In particular, we discuss the medium-induced broadening of the away-side peak. The surface bias, i.e. a trigger-dependent modification of the spatial distribution of hard scattering vertices, will be addressed as well.
Presented by Dr. Kirill LAPIDUS on 12 Jan 2016 at 4:30 PM
Session: Session 6
High energy proton lead collisions at the LHC allow us to study the effects of the nucleus on hard/soft interactions. These give us a handle on the initial state effects by taking advantage of asymmetry in the collision system. I will summarize the results on the nuclear modification factors for inclusive and heavy flavor tagged jets based on Run1 data collected in 2013 for pPb collisions at \sqrt ... More
Presented by Mr. Raghav KUNNAWALKAM ELAYAVALLI on 12 Jan 2016 at 11:30 AM
Session: Session 4
The advent of the LHC opened up new perspectives for jet-quenching physics. For the first time, high enough energies are reached in heavy-ion experiments to produced jets in large numbers, and the unprecedented detector capabilities of ALICE, ATLAS and CMS, not only extend the kinematic range for the measurements previously performed at RHIC, but also allow to explore a variety of new jet-quenchi ... More
Presented by Prof. Yacine MEHTAR-TANI on 12 Jan 2016 at 5:00 PM
Session: Session 4
The PHENIX Collaboration has examined charm and bottom quark production in p+p, p+A, and A+A collisions at RHIC for the past 15 years. While much has been learned, our understanding of the effects apparent in nuclear collisions is constantly evolving. Recent instrumentation upgrades have led to a greatly increased capability for heavy quark measurements at PHENIX, namely the separation of charm ... More
Presented by Dr. Matt DURHAM on 11 Jan 2016 at 4:30 PM
Session: Session 7
Presented by Prof. Zhenyu YE on 12 Jan 2016 at 3:00 PM
Session: Session 8
The large interest in open heavy-flavour physics in heavy-ion collisions is proven by the many results obtained at both RHIC and LHC energies. Heavy quarks are produced in the early stages of heavy-ion collisions and their abundance is not expected to change throughout the evolution of the system. Hence, they behave as self-generated probes that traverse the hot and dense medium losing energy via ... More
Presented by Elena BRUNA on 12 Jan 2016 at 4:00 PM
Session: Session 7
Searches for new physics will increasingly depend on identifying deviations from precision Standard Model predictions. At higher energies and higher precision, the heavy quarks play an increasingly prominent role. Recent theoretical developments improve our ability to address the multi-scale problem and properly incorporate heavy quark masses across the full kinematic range. This includes a Hybrid ... More
Presented by Prof. Fredrick OLNESS on 12 Jan 2016 at 2:00 PM
Session: Session 3
Presented by Ramona VOGT on 11 Jan 2016 at 2:00 PM
Session: Session 8
Production of heavy quarkonia is arguably one of the most fascinating subjects in strong interaction physics. It offers unique perspectives into the formation of QCD bound states. However, since the discovery of J/psi more than 40 years ago, theorists still have not been able to fully understand its production mechanism. In this talk, I will present recent new developments in understanding the pro ... More
Presented by Prof. Jianwei QIU
Session: Session 1
In this talk we discuss the resummation of large logarithmic perturbative corrections to single-inclusive jet production at hadron colliders. The corrections arise near the threshold for the partonic reaction, when the incoming partons have just enough energy to produce the high-transverse-momentum final state. We show that these corrections are important on the way to precision jet phenomenology ... More
Presented by Mr. Patriz HINDERER on 11 Jan 2016 at 9:40 AM
Session: Session 4
The study of quarkonium production in nuclear collisions is an essential tool to investigate the properties of the medium. After extended investigations at SPS and RHIC energies, the LHC experiments have collected, during run-1, a wealth of new data on charmonium and bottomonium production in both Pb-Pb and p-Pb collisions. Among other results, strong indications for the observation of charm quark ... More
Presented by Dr. Enrico SCOMPARIN on 11 Jan 2016 at 4:00 PM
Session: Session 3
Theoretical and experimental advances in understanding light jet/hadron production and modification in Pb+Pb reactions have been a highlight of the LHC heavy ion program. At the same time, the detailed mechanisms of heavy quark propagation and energy loss in dense QCD matter are not yet fully understood. With this motivation, we present theoretical predictions for the  nuclear-induced attenuatio ... More
Presented by Dr. HONGXI XING on 11 Jan 2016 at 3:00 PM
Session: Session 9
I will discuss rapidity factorization approach and show how it can be used in analysis of evolution of gluon transverse momentum dependent (TMD) distribution functions. I will introduce an evolution equation which describes a smooth transition between linear evolution at x~1 and non-linear one at x<<1.
Presented by Dr. Andrey TARASOV on 13 Jan 2016 at 9:30 AM
Session: Session 1
Using a new version of Soft Collinear Effective Theory, SCET_++, with a new "soft-collinear" mode, we achieve the resummation of logarithms of jet radii R in jet rates and jet thrust cross sections beyond leading-log accuracy. We extract two and three-loop anomalous dimensions necessary for resummation of (global) logs of R to NNLL and N3LL accuracy.
Presented by Dr. Andrew HORNIG on 11 Jan 2016 at 10:10 AM
Session: Session 11
Presented by ORGANIZERS on 13 Jan 2016 at 3:30 PM
Session: Session 6
High momentum particle correlations, such as di-hadron, direct photon-hadron and jet-hadron correlations, have provided valuable insight into the properties of the Quark Gluon Plasma. High momentum hadrons as triggers are biased to have originated near the surface of the created medium. Direct photons can originate from anywhere within the medium. Fully reconstructed jets as a trigger can be tuned ... More
Presented by Megan CONNORS on 12 Jan 2016 at 12:00 PM
Session: Session 2
Event shapes provide a key method of measuring jets in deep-inelastic scattering (DIS). This was done successfully by H1 and ZEUS and compared with theoretical calculations with next-to-leading-logarithmic (NLL) resummation. We will present our progress for a high precision calculation of​ a event shape called DIS thrust, with next-to-next-to-next-to-leading-logarithmic resummation. We will als ... More
Presented by Daekyoung KANG on 11 Jan 2016 at 12:00 PM
Session: Session 11
We propose a new observable, called zeal, to analyze events with jets in heavy ion collisions. The observable measures how a thermal medium affects the multiplicity and distribution of energetic particles in a jet. Using few known models for energy loss and jet quenching, we demonstrate its capability to distinguish the physics of these models.
Presented by Dr. Rishi SHARMA
Session: Session 1
Presented by Dr. Ivan VITEV on 11 Jan 2016 at 9:00 AM