# Publications by Gavin Salam

## Boosted objects: A probe of beyond the standard model physics

European Physical Journal C Springer-Verlag **71** (2011)

We present the report of the hadronic working group of the BOOST2010 workshop held at the University of Oxford in June 2010. The first part contains a review of the potential of hadronic decays of highly boosted particles as an aid for discovery at the LHC and a discussion of the status of tools developed to meet the challenge of reconstructing and isolating these topologies. In the second part, we present new results comparing the performance of jet grooming techniques and top tagging algorithms on a common set of benchmark channels. We also study the sensitivity of jet substructure observables to the uncertainties in Monte Carlo predictions.

## Energy correlation functions for jet substructure

JOURNAL OF HIGH ENERGY PHYSICS (2013) ARTN 108

## Pileup subtraction for jet shapes.

Physical review letters **110** (2013) 162001-

Jets in high energy hadronic collisions often contain the fingerprints of the particles that produced them. Those fingerprints, and thus the nature of the particles that produced the jets, can be read off with the help of quantities known as jet shapes. Jet shapes are, however, severely affected by pileup, the accumulation in the detector of the residues of the many simultaneous collisions taking place in the Large Hadron Collider (LHC). We introduce a method to correct for pileup effects in jet shapes. Relative to earlier, limited approaches, the key advance resides in its full generality, achieved through a numerical determination, for each jet, of a given shape's susceptibility to pileup. The method rescues the possibility of using jet shapes in the high pileup environment of current and future LHC running, as we show with examples of quark-gluon discrimination and top tagging.

## Jet fragmentation function moments in heavy ion collisions

EUROPEAN PHYSICAL JOURNAL C **73** (2013) ARTN 2319

## Hard Processes in Proton-Proton Collisions at the Large Hadron Collider

in *ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, VOL 62*, **62** (2012) 387-405

## Higgs- and Z-boson production with a jet veto.

Physical review letters **109** (2012) 202001-

We derive first next-to-next-to-leading logarithmic resummations for jet-veto efficiencies in Higgs and Z-boson production at hadron colliders. Matching with next-to-next-to-leading order results allows us to provide a range of phenomenological predictions for the LHC, including cross-section results, detailed uncertainty estimates, and comparisons to current widely used tools.

## NLL+NNLO predictions for jet-veto efficiencies in Higgs-boson and Drell-Yan production

Journal of High Energy Physics **2012** (2012)

Using the technology of the CAESAR approach to resummation, we examine the jet-veto efficiency in Higgs-boson and Drell-Yan production at hadron colliders and show that at next-to-leading logarithmic (NLL) accuracy the resummation reduces to just a Sudakov form factor. Matching with NNLO calculations results in stable predictions for the case of Drell-Yan production, but reveals substantial uncertainties in gluon-fusion Higgs production, connected in part with the poor behaviour of the perturbative series for the total cross section. We compare our results to those from powheg with and without reweighting by HqT, as used experimentally, and observe acceptable agreement. In an appendix we derive the part of the NNLL resummation corrections associated with the radius dependence of the jet algorithm.

## REVIEW OF PARTICLE PHYSICS Particle Data Group

PHYSICAL REVIEW D **86** (2012) ARTN 010001

## NLL plus NNLO predictions for jet-veto efficiencies in Higgs-boson and Drell-Yan production

JOURNAL OF HIGH ENERGY PHYSICS (2012) ARTN 159

## Jet substructure at the Tevatron and LHC: new results, new tools, new benchmarks

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS **39** (2012) ARTN 063001

## Jet reconstruction in heavy ion collisions

EUROPEAN PHYSICAL JOURNAL C **71** (2011)

## Boosted objects: a probe of beyond the standard model physics

EUROPEAN PHYSICAL JOURNAL C **71** (2011) ARTN 1661

## Fluctuations and asymmetric jet events in PbPb collisions at the LHC

EUROPEAN PHYSICAL JOURNAL C **71** (2011) ARTN 1692

## Perturbative QCD for the LHC

Proceedings of 35th International Conference of High Energy Physics — PoS(ICHEP 2010) Sissa Medialab (2011)

## A posteriori inclusion of PDFs in NLO QCD final-state calculations: The APPLGRID Project

Proceedings of Science (2010)

The calculation of cross-sections at Next-to-Leading order in QCD involves the integration over the final state phase space in order to cancel the infra-red divergences. For the calculation of cross sections for jet observables in deep-inelastic scattering or at hadron-hadron colliders this integration requires the Monte Carlo generation of a large number of event weights, and must be repeated for any calculation with a different choice of parton densities within the proton or different choice of factorisation or renormalisation scale. This makes the full calculation with many of the available parton density function error sets, or any iterative fit of the parton densities themselves, prohibitive in terms of the processing time required. A method for the a posteriori inclusion of the parton densities in the calculation is presented. In this method, the Monte Carlo weights from the integration over the hard-subprocess phase space are stored in a look-up table so that the full calculation need be performed only once, after which the cross section can be obtained with any parton density set by a fast convolution with the stored weights. A detailed example from inclusive jet production at the LHC is presented. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

## A posteriori inclusion of parton density functions in NLO QCD ﬁnal-state calculations at hadron colliders: The APPLGRID Project

Proceedings of XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS 2010) Sissa Medialab (2010)

## Giant QCD K-factors beyond NLO

JOURNAL OF HIGH ENERGY PHYSICS (2010) ARTN 084

## Phenomenology of event shapes at hadron colliders

JOURNAL OF HIGH ENERGY PHYSICS (2010) ARTN 038