Phenomenology 2018 Symposium

Session

QCD & EW I

14

8 May 2018, 14:00

G-27 (Benedum Hall)

526. CTEQ-TEA parton distributions, LHC constraints, and LHC predictions

Pavel Nadolsky (Southern Methodist University)

08/05/2018, 14:00

parallel talk

I give a lightning tour of recent developments in CTEQ-TEA parton distribution functions (PDFs) and of a new program PDFSense for visualization of experimental constraints on the PDFs. The PDFSense tool allows a user to identify and plot individual measurements in the CTEQ-TEA analysis constraining the PDF dependence of a QCD observable of interest, such as a precision electroweak or...

445. The NNLO QCD soft function for 1-jettiness

Roberto Mondini

08/05/2018, 14:15

parallel talk

We calculate the soft function for the global event variable 1-jettiness at next-to-next-to-leading order (NNLO) in QCD. We focus specifically on the non-Abelian contribution, which, unlike the Abelian part, is not determined by the next-to leading order result. The calculation uses the known general forms for the emission of one and two soft partons and is performed using a...

516. Power jets: a new framework for QCD radiation

Keith Pedersen (Illinois Institute of Technology)

08/05/2018, 14:30

parallel talk

The LHC's high-luminosity upgrade will create intense pileup, which motivates a more global, correlation-based approach to collider event reconstruction. The QCD power spectrum encodes the total event shape at large and small angles. Jets and their substructure can then be extracted from this power spectrum. A useful feature of this approach is the absence of a jet radius parameter, so that...

602. Probing QCD with Photons and Jets produced in proton-proton collisions with the ATLAS Detector

Josu Cantero Garcia (Oklahoma State University (US))

08/05/2018, 14:45

parallel talk

Processes where at least one photon or one jet produced in a proton-proton collision are measured with the ATLAS detector. The results of the measurements are used to test QCD predictions in several phase-space regions.

615. Heavy Quark Jet Fragmentation

Lin Dai (University of Pittsburgh)

08/05/2018, 15:00

parallel talk

We study Heavy quark jet fragmenting processes. When heavy quarks are involved in a jet, the quark mass can give a large impact on the jet cross section and its substructures. With this motivation, at next-to-leading order in $\alpha_s$ we calculated the heavy quark mass effects on the fragmentation functions to a jet (FFJs) and the jet fragmentation functions (JFFs), where the former...

462. Eikonal fit and Comprehensive fit to high energy data for $\sigma$, $\rho$, and $B$: An Update

Dr Phuoc Ha (Towson University), Phuoc Ha (Towson University)

08/05/2018, 15:15

parallel talk

We update our eikonal fit and comprehensive fits to high energy data on proton--proton and antiproton--proton forward scattering for $\sigma$, $\rho$, and $B$ including the Telescope Array value of total proton-proton cross section at $W=\sqrt{s}$ = 95 TeV and the latest measurements of the inelastic cross sections at $W$= 8 TeV (by TOTEM and ATLAS) and 13 TeV (by CMS and ATLAS). The stability...

554. Lightcone resummation in H -> J/Psi + gamma to O(v^4)

Wai Kin Lai (TUM)

08/05/2018, 15:30

parallel talk

Higgs exclusive decay to a J/Psi plus a photon is a clean channel to probe the Higgs-charm coupling. In this process, large logarithms log(m_c/m_H) are resummed using the evolution of the lightcone distribution amplitude (LCDA), which in turn is matched to the long-distance matrix elements in NRQCD at the scale m_c. We will demonstrate the matching to O(v^4) and its phenomenological implications.

598. Charmed Baryon to Strange Baryon Decay using QCD Sum Rules

Mr Bijit Singha (Carnegie Mellon University)

08/05/2018, 15:45

We estimate the rate of the Cabibbo-favored weak decay, $\Lambda_c^+ \rightarrow \Lambda_s^0~ \pi^+$, using QCD Sum Rules. A three-point correlation function of field operators corresponding to charmed lambda ($\Lambda_c^+$), strange lambda ($\Lambda_s^0$), and weak Hamiltonian ($H_W$) is considered in the presence of an external pion field. We evaluate the lowest-order perturbative diagram in...