# Dr Jon Hays

## Director of Taught Programmes | Reader in Particle Physics

Email: j.hays@qmul.ac.uk
Telephone: 020 7882 6150
Room Number: G.O. Jones Building, Room 411

## Teaching

### My teaching

Currently, I tutor for the Synoptic Physics module(PHY300) that runs in Semester A and am module organiser for the module on Introduction to C++ Programming (PHY4321) that runs in Semester B.

## Research

### My research interests

I am interested in the origins of the masses of the fundamental particles. I have been involved in the search for the Higgs boson in its incarnation within the Standard Model and in a number of supersymmetric models. I was one the two official representatives of the D0 experiment on the Tevatron New Physics and Higgs Working group. This group performs the statistical combination of the results of Higgs searches at the two experiments that ran at the Tevatron proton-anti-proton collider at Fermilab near Chicago, IL. I was also an important contributor the continuing search for the standard model Higgs boson for the CMS experiment at the LHC at CERN, working on the key channel where the Higgs boson decays to two photons. This culminated in the discovery of a Higgs-like boson in July 2012. My work in Higgs physics now continues on the ATLAS experiment where I am interested in measuring the physical properties of the new boson and how it interacts with the other fundamental particles. These measurements will reveal the nature of the new particle and tell us whether we have indeed found the boson predicted by the standard model, or perhaps something new that we cannot yet explain.

## 2016

Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC pp collision data at $\sqrt{s}=7$ and 8 TeV
Aad, Georges et al.
JHEP, Volume 1608, page 045. Publication year: 2016

DOI: 10.1007/JHEP08(2016)045

## 2015

Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
Aad, Georges et al.
Phys.Rev.Lett., Volume 114, page 191803. Publication year: 2015

DOI: 10.1103/PhysRevLett.114.191803

## 2014

Measurement of the properties of a Higgs boson in the four-lepton final state
Chatrchyan, Serguei et al.
Phys.Rev., Volume D89, page 092007. Publication year: 2014

DOI: 10.1103/PhysRevD.89.092007

## 2013

Identification of b-quark jets with the CMS experiment
Chatrchyan, Serguei et al.
JINST, Volume 8, page P04013. Publication year: 2013

DOI: 10.1088/1748-0221/8/04/P04013

Observation of a new boson with mass near 125 GeV in pp collisions at $\sqrt{s}$ = 7 and 8 TeV
Chatrchyan, Serguei et al.
JHEP, Volume 1306, page 081. Publication year: 2013

DOI: 10.1007/JHEP06(2013)081

Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
Chatrchyan, Serguei et al.
Phys.Lett., Volume B718, page 795-814. Publication year: 2013

DOI: 10.1016/j.physletb.2012.11.025

Study of the Mass and Spin-Parity of the Higgs Boson Candidate Via Its Decays to Z Boson Pairs
Chatrchyan, Serguei et al.
Phys.Rev.Lett., Volume 110, page 081803. Publication year: 2013

DOI: 10.1103/PhysRevLett.110.081803

Measurement of the B(s) to mu+ mu- branching fraction and search for B0 to mu+ mu- with the CMS Experiment
Chatrchyan, Serguei et al.
Phys.Rev.Lett., Volume 111, page 101804. Publication year: 2013

DOI: 10.1103/PhysRevLett.111.101804

## 2012

Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
Chatrchyan, Serguei et al.
Phys.Lett., Volume B716, page 30-61. Publication year: 2012

DOI: 10.1016/j.physletb.2012.08.021

Combined results of searches for the standard model Higgs boson in $pp$ collisions at $\sqrt{s}=7$ TeV
Chatrchyan, Serguei et al.
Phys.Lett., Volume B710, page 26-48. Publication year: 2012

DOI: 10.1016/j.physletb.2012.02.064

Performance of CMS muon reconstruction in $pp$ collision events at $\sqrt{s}=7$ TeV
Chatrchyan, Serguei et al.
JINST, Volume 7, page P10002. Publication year: 2012

DOI: 10.1088/1748-0221/7/10/P10002

Study of high-pT charged particle suppression in PbPb compared to $pp$ collisions at $\sqrt{s_{NN}}=2.76$ TeV
Chatrchyan, Serguei et al.
Eur.Phys.J., Volume C72, page 1945. Publication year: 2012

DOI: 10.1140/epjc/s10052-012-1945-x

Suppression of non-prompt $J/\psi$, prompt $J/\psi$, and Y(1S) in PbPb collisions at $\sqrt{s_{NN}}=2.76$ TeV
Chatrchyan, Serguei et al.
JHEP, Volume 1205, page 063. Publication year: 2012

DOI: 10.1007/JHEP05(2012)063

## 2011

Determination of Jet Energy Calibration and Transverse Momentum Resolution in CMS
Chatrchyan, Serguei et al.
JINST, Volume 6, page P11002. Publication year: 2011

DOI: 10.1088/1748-0221/6/11/P11002

Observation and studies of jet quenching in PbPb collisions at nucleon-nucleon center-of-mass energy = 2.76 TeV
Chatrchyan, Serguei et al.
Phys.Rev., Volume C84, page 024906. Publication year: 2011

DOI: 10.1103/PhysRevC.84.024906

Forward-backward asymmetry in top quark-antiquark production
Abazov, Victor Mukhamedovich et al.
Phys.Rev., Volume D84, page 112005. Publication year: 2011

DOI: 10.1103/PhysRevD.84.112005

## 2010

Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions at the LHC
Khachatryan, Vardan et al.
JHEP, Volume 1009, page 091. Publication year: 2010

DOI: 10.1007/JHEP09(2010)091

Transverse-momentum and pseudorapidity distributions of charged hadrons in $pp$ collisions at $\sqrt{s}=7$ TeV
Khachatryan, Vardan et al.
Phys.Rev.Lett., Volume 105, page 022002. Publication year: 2010

DOI: 10.1103/PhysRevLett.105.022002

Transverse momentum and pseudorapidity distributions of charged hadrons in pp collisions at $\sqrt{s} = 0.9$ and 2.36 TeV
Khachatryan, Vardan et al.
JHEP, Volume 1002, page 041. Publication year: 2010

DOI: 10.1007/JHEP02(2010)041

## 2009

Observation of Single Top Quark Production
Abazov, V.M. et al.
Phys.Rev.Lett., Volume 103, page 092001. Publication year: 2009

DOI: 10.1103/PhysRevLett.103.092001

## 2008

The CMS Experiment at the CERN LHC
Chatrchyan, S. et al.
JINST, Volume 3, page S08004. Publication year: 2008

DOI: 10.1088/1748-0221/3/08/S08004

Measurement of $B^0_{s}$ mixing parameters from the flavor-tagged decay $B^0_{s} \to J/\psi \phi$
Abazov, V.M. et al.
Phys.Rev.Lett., Volume 101, page 241801. Publication year: 2008

DOI: 10.1103/PhysRevLett.101.241801

## 2006

The Upgraded D0 detector
Abazov, V.M. et al.
Nucl.Instrum.Meth., Volume A565, page 463-537. Publication year: 2006

DOI: 10.1016/j.nima.2006.05.248

First direct two-sided bound on the $B^0_{s}$ oscillation frequency
Abazov, V.M. et al.
Phys.Rev.Lett., Volume 97, page 021802. Publication year: 2006

DOI: 10.1103/PhysRevLett.97.021802

## 2004

Observation and properties of the $X(3872)$ decaying to $J/\psi \pi^+ \pi^-$ in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV
Abazov, V.M. et al.
Phys.Rev.Lett., Volume 93, page 162002. Publication year: 2004

DOI: 10.1103/PhysRevLett.93.162002

• Aaltonen T, Abazov VM, Abbott B et al. (publicationYear). Tevatron Constraints on Models of the Higgs Boson with Exotic Spin and Parity Using Decays to Bottom-Antibottom Quark Pairs. nameOfConference

QMRO: qmroHref

Citations: 0
• Abazov VM, Abbott B, Acharya BS et al. (2014). Improved b quark jet identification at the D0 experiment. nameOfConference

QMRO: qmroHref

Citations: 17
• Abazov VM, Abbott B, Acharya BS et al. (2014). Electron and photon identification in the Do experiment. nameOfConference

QMRO: qmroHref

Citations: 19
• Aaltonen T, Abazov VM, Abbott B et al. (2014). Combination of measurements of the top-quark pair production cross section from the Tevatron Collider. nameOfConference

QMRO: qmroHref

Citations: 60

## Supervision

This is not an exhaustive list and I would be happy to discuss other project possibilities.

## Performance

### Invited talks

• "BSM Higgs Searches at the Tevatron", Higgs Hunting Workshop, July 2013, Orsay, Paris
• "ATLAS 126 GeV Higgs Results", The LHC Higgs Signal: Characterization, Interpretation and BSM Model Implecations: Workshop, April 2013, University of California, Davis, CA, USA
• "Degenerate Higgs Studies", The LHC Higgs Signal: Characterization, Interpretation and BSM Model Implecations: Workshop, April 2013, University of California, Davis, CA, USA
• "Property Measurements of the Higgs-Like Boson at CMS", International Workshop on Discovery Physics at the LHC, December 2012, Kruger National Park, South Africa
• "BSM and SUSY Higgs Results from CMS", The Hunt for New Particles, from the Alps to the Plains to the Rockies, February 2012, Aspen, CO, USA
• "Combination of Standard Model Higgs Results from the Tevatron", 46th Rencontre De Moriond (QCD), March 2011, La Thuile, Italy
• "Recent results in MSSM Higgs Searches at D0", Fermilab, Joint-Theoretical-Experiment Seminar ("Wine and Cheese"), October 2010, Fermilab, Chicago, USA
• "Standard Model and Non-Standard Model Searches at the Tevatron", 16th Internation Symposium on Particles, Strings and Cosmology, July 2010, Valencia, Spain
• "Tevatron Searches for New Physics with Leptons", 45th Recontres De Moriond (EWK), March 2010, La Thuile, Italy
• "Searches for Non-Standard Model Higgs Bosons at the Tevatron", Recontres De Blois: "Windows on the Universe", June 2009, Blois, France
• "Constraints on Parton Density Functions from D0", 16th International Workshop on Deep Inelastic Scattering, April 2008, London, UK
• "Electroweak Measurements at the Tevatron", 20th Rencontres De Physique De La Vallee D'Aoste, March 2006, La Thuile, Italy
• "Precise W and Z Cross Sections at the Tevatron", 13th International Workshop on Deep Inelastic Scattering, April 2005, Madison, Wisconsin, USA
• "Non-SUSY Searches at the Tevatron", 38th Recontres De Moriond (QCD), March 2003, Les Arcs, France
• "D0 Run-II Trigger and Data Acquistion System", DPF-2002, Williamsburg, Virginia, USA