25th International Workshop on Deep Inelastic Scattering and Related Topics

Session

WG1 and WG4 joint session

5 Apr 2017, 14:00

School of Physics and Astronomy (University of Birmingham)

95. Measurement of Jet Production Cross Sections in Deep-inelastic ep Scattering at HERA

Daniel Britzger (Deutsches Elektronen-Synchrotron (DE))

05/04/2017, 14:00

WG1) Structure Functions and Parton Densities

A precision measurement of jet cross sections in neutral current deep-inelastic scattering for photon virtualities $5.5 < Q^2 < 80$ GeV$^2$ and inelasticities $0.2 < y < 0.6$ is presented, using data taken with the H1 detector at HERA, corresponding to an integrated luminosity of 290 pb$^{−1}$. Double-differential inclusive jet, dijet and trijet cross sections are measured simultaneously and...

307. Determination of the strong coupling constant from inclusive jet cross sections

Klaus Rabbertz (KIT - Karlsruhe Institute of Technology (DE))

05/04/2017, 14:22

WG4) Hadronic and Electroweak Observables

Measurements of inclusive jet cross sections have been performed by a number of experiments in proton—proton, proton—anti-proton, and electron—proton collisions and at different center-of-mass energies. Since inclusive jets are directly sensitive to the strong coupling constant, and exhibit a high sensitivity to the gluon content of the proton, a thorough understanding of the available...

127. Multi-differential jet cross sections from CMS

Engin Eren (Deutsches Elektronen-Synchrotron (DE))

05/04/2017, 14:44

WG4) Hadronic and Electroweak Observables

We present measurements of multi-differential Jet cross sections over a wide range in transverse momenta from inclusive jets to multi-jet final states. We present studies on the impact these measurements have on the determination of the strong coupling alphas as well as on parton density functions.

39. Measurement of the inclusive jet & dijet production, k-t splitting in Z with the ATLAS detector

Jeff Dandoy (University of Pennsylvania (US))

05/04/2017, 15:06

WG1) Structure Functions and Parton Densities

The production of inclusive jets and di-jets at hadron colliders provides a stringent test of perturbative QCD at the highest energies. The process can also be used to probe the gluon density function of the proton.

The ATLAS collaboration has measured the inclusive jet production cross section in 20.3 /fb of data collected at a center-of-mass energy of 8TeV and in 3.2 /fb of data...

38. Measurement of photon production cross sections with the ATLAS detector

Claudia Beatriz Glasman Kuguel (Universidad Autonoma de Madrid (ES))

05/04/2017, 16:00

WG1) Structure Functions and Parton Densities

The production of prompt isolated photons at hadron colliders provides a stringent test of perturbative QCD and can be used to probe the gluon density function of the proton.

The ATLAS collaboration has performed precise measurements of the inclusive production of isolated prompt photons at a center-of-mass energy of 13 TeV, differential in both rapidity and the photon transverse momentum. In...

199. Impact of the inclusion of precise $Z$ $p_T$ distributions in a PDF fit

Maria Ubiali (University of Cambridge)

05/04/2017, 16:20

WG1) Structure Functions and Parton Densities

The LHC has recently precise measurements of the transverse momentum
of the $Z$ boson that provide a unique constraint on the structure of the
proton. Recent theoretical developments have allowed the calculation of these
process at next-to-next-to-leading order. In this talk theoretical fixed-order
predictions for this data are presented and their impact on the determination
of PDFs is described.

106. High Precision Measurement of the differential W and Z boson cross-sections

Philip Sommer (Albert-Ludwigs-Universitaet Freiburg (DE))

05/04/2017, 16:40

WG1) Structure Functions and Parton Densities

Measurements of the Drell-Yan production of W and Z/gamma bosons at the LHC provide a benchmark of our understanding of perturbative QCD and probe the proton structure in a unique way. The ATLAS collaboration has performed new high precision measurements at a center-of-mass energies of 7 and 13 TeV. The measurements are performed for W+, W- and Z/gamma bosons integrated and as a function of...

89. W, Z and top production measurements at LHCb

Marcin Kucharczyk (Polish Academy of Sciences (PL))

05/04/2017, 17:00

WG4) Hadronic and Electroweak Observables

LHCb, while purpose built for b-physics, also functions as a general purpose forward detector, covering the pseudo-rapidity range 2.0 to 5.0. This has allowed performing several measurements concerning the production of W, Z and top. A selection of these results will be presented, highlighting the scope of the LHCb physics programme.

114. Features of W production in p-p, p-Pb and Pb-Pb collisions

Hannu Paukkunen (University of Jyväskylä)

05/04/2017, 17:20

WG1) Structure Functions and Parton Densities

We consider the production of inclusive W bosons in variety of high-energy hadronic collisions: p-p, p-p$\overline{\rm p}$, p-Pb, and Pb-Pb. In particular, we focus on the resulting distributions of charged leptons from W decay that can be measured with relatively low backgrounds. The leading-order expressions within the collinearly factorized QCD indicate that the c.m. energy dependence at...

123. [Contribution Withdrawn] Vector boson (W, Z) inclusive and differential measurements from CMS

WG4) Hadronic and Electroweak Observables

We present the latest CMS results from precision measurements of vector boson production.

68. CONTRIBUTION MERGED

Marc Escalier (LAL-Orsay (FR))

WG4) Hadronic and Electroweak Observables

This abstract is merged, the merged contribution is at
https://indico.cern.ch/event/568360/contributions/2448699/

Previous abstract
Measurement of the kt splitting scales in Z events with the ATLAS detector

While properties of the jets are typically directly using the jet momenta, we present here a complementary approach, studying the jet production rates at different resolution scales. In...