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Publication list for Christopher Lester

My thesis

  Model independent sparticle mass measurements at ATLAS
  Christopher Gorham Lester
  Note: Presented on 12 Dec 2001
CERN-THESIS-2004-003, Dec 2001. 188pp. See also my thesis web page and local postscript copy. Alt cern.

Published papers with small author lists, or those with direct personal contributions (most recent at top)

Title Authors Journal Ref arXiv Ref comments
Search for Non-Standard Sources of Parity Violation in Jets at root s = 8 TeV with CMS Open Data Christopher G. Lester and Matthias Schott doi: arXiv:1904.11195 Lead to item 3 on ATLAS Weekly meeting Tuesday 10 Sep 2019.
Biased bootstrap sampling for efficient two-sample testing Thomas P. S. Gillam and Christopher G. Lester doi:10.1088/1748-0221/13/12/P12014 (2018_JINST_13_P12014) arXiv:1810.00335 A proof of the result mentioned in equation (5) may be found in this pdf. It was not included in the published paper for reasons of space. There is evidence that at least one person has seen the paper.
Erratum 2 to: Difference between emu species hides a test for lepton flavour violation Christopher Gorham Lester and Benjamin Hylton Brunt doi:10.1007/JHEP06(2019)014 arXiv:1612.02697
Erratum to: Difference between emu species hides a test for lepton flavour violation Christopher Gorham Lester and Benjamin Hylton Brunt doi:10.1007/JHEP08(2017)069
Difference between emu species hides a test for lepton flavour violation Christopher Gorham Lester and Benjamin Hylton Brunt doi:10.1007/JHEP03(2017)149 See also Erratum 1: doi:10.1007/JHEP08(2017)069 and Erratum 2 doi:10.1007/JHEP06(2019)014
Search for TeV-scale gravity signatures in high-mass final states with leptons and jets with the ATLAS detector at root s = 13 TeV The ATLAS Collaboration doi:10.1016/j.physletb.2016.07.030 arXiv:1606.02265 See also ATLAS hosted version of the paper, the paper on GLANCE, V2 circulation paper, internal twiki, and an ATLAS Briefing
A fast, simple, and naturally machine-precision algorithm for calculating both symmetric and asymmetric MT2, for any physical inputs Christopher G. Lester and Benjamin Nachman doi:10.1007/JHEP03(2015)100 arXiv:1411.4312 Using ideas from http://dx.doi.org/10.1016/j.cagd.2006.01.002 on testing for ellipse intersections. Atlas users may want to use the package via this package. A raw implementation is available here lester_mt2_bisect.h from the arXiv. Note also arXiv:1509.01831, a new work from Lally.
The Matrix Method Reloaded: improving estimates of the number of fake leptons in hadron collider events Thomas P. S. Gillam, Christopher G. Lester doi:10.1007/JHEP11(2014)031 arXiv:1407.5624
A search for heffalon production using the ATLAS and CMS experiments at the Large Hadron Collider Alan J. Barr and Christopher G. Lester doi: arXiv:1303.7367

Appeard on 1st April 2013 arXiv listing. See also rejection letter from PRL and other evidence of the heffalon. See also this paper. Cited by doi:10.1353/tech.2014.0092

Significance Variables Benjamin Nachman and Christopher G. Lester doi:10.1103/PhysRevD.88.075013 Phys. Rev. D 88, 075013 (2013) [12 pages] arXiv:1303.7009 jhep author page. Atlas internal note on MET significance. Ben Nachman ATLAS JET ETMISS talk, May 2013..
Finding Higgs bosons heavier than 2 m_W in dileptonic W-boson decays Alan J. Barr, Ben Gripaios, Christopher G. Lester doi:10.1016/j.physletb.2012.06.053 arXiv:1110.2452 See also implementation code.
Re-weighing the evidence for a Higgs boson in dileptonic W-boson decays Alan J. Barr, Ben Gripaios, Christopher G. Lester Phys. Rev. Lett. 108, 041803 (2012) [4 pages] doi:10.1103/PhysRevLett.108.041803 and, alas, also the erratum (doi:10.1103/PhysRevLett.108.109902 arXiv:1108.3468 See also implementation code. Accepted by PRL.
Speedy Higgs boson discovery in decays to tau lepton pairs : h→ττ Alan J. Barr, Sky T. French, James A. Frost, Christopher G. Lester doi:10.1007/JHEP10(2011)080 arXiv:1106.2322 See also implementation code. (JHEP author page). Some private links here.
Guide to transverse projections and mass-constraining variables A. J. Barr, T. J. Khoo, P. Konar, K. Kong, C. G. Lester, K. T. Matchev, M. Park PRD/v84/i9/e095031 doi:10.1103/PhysRevD.84.095031 arXiv:1105.2977 Kong submitted a conf proceeding for PANIC2011 that appears in the hep-ph listing for Mon 29 Aug 2011 as arXiv:1108.5182. First title on the arXiv was 'A storm in a "T" cup: the connoisseur's guide to transverse projections and mass-constraining variables'.
The stransverse mass, MT2, in special cases Christopher G. Lester JHEP05(2011)076 doi:/10.1007/JHEP05(2011)076 arXiv:1103.5682 Accepted by JHEP. Note added Jan 2018: here is a picture of something spotted by Gabija Zemaityte on the door of 104/2-C07 in CERN. Funny thing is, I myself have been skipping past that intro these last 7 years, and thus forgot I wrote that text, thereby becoming one of the people it mentions!
The impact of the ATLAS zero-lepton, jets and missing momentum search on a CMSSM fit B.C. Allanach, T.J. Khoo, C.G. Lester, S.L. Williams doi:10.1007/JHEP06(2011)035 arXiv:1103.0969 Science 20 then wrote this article in which there is a football match and ATLAS scores 3-0 against CMS. Also covers Allanach,Khoo,Lester,Williams. JHEP status page here.
Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions The ATLAS Collaboration doi:10.1016/j.physletb.2011.05.061 arXiv:1102.5290 See also supplementary plots and SLHA files. Can also be found in CDS. Some comment in a Nature News article by Geoff Brumfiel (doi:10.1038/471013a) and an editorial in nature (doi:10.1038/471006a). A blogpost here. A sensible and thoughtful blog post comparing the ATLAS and CMS techniques apparently based on an an earlier post to this blog. A link from another blog that is mainly interested in the 1-lep and CMS results. Some comment in Flip Tanedo's blog and in Resonaances. This-and-That from BackReAction and something from Not Even Wrong and even on slashdot. Symmetry magazine interviews Buchmueller about alphaT and Ben about the results". Science 20 then wrote this article in which there is a football match and ATLAS scores 3-0 against CMS. Also covers Allanach,Khoo,Lester,Williams. here" is an example of a conference proceeding on it. ATLAS's 1/fb follow up paper and also at arxiv:1109.6572
A comment on "Amplification of endpoint structure for new particle mass measurement at the LHC" A. J. Barr, C. Gwenlan, C. G. Lester, C. J. S. Young 10.1103/PhysRevD.83.118701 doi:10.1103/PhysRevD.83.118701 arXiv:1006.2568
A Review of the Mass Measurement Techniques proposed for the Large Hadron Collider Alan J. Barr, Christopher G. Lester J. Phys. G: Nucl. Part. Phys. 37 (2010) 123001 (52pp) doi:10.1088/0954-3899/37/12/123001 arXiv:1004.2732 Local copy local copy
Measuring Slepton Masses and Mixings at the LHC Jonathan L. Feng, Sky T. French, Iftah Galon, Christopher G. Lester, Yosef Nir, Yael Shadmi, David Sanford, Felix Yu JHEP01(2010)047 doi:10.1007/JHEP01(2010)047 arXiv:0910.1618 Published by JHEP
Transverse masses and kinematic constraints: from the boundary to the crease Alan J. Barr, Ben Gripaios, Christopher G. Lester JHEP11(2009)096 doi:10.1088/1126-6708/2009/11/096 arXiv:0908.3779 Published by JHEP
The Shifted Peak: Resolving Nearly Degenerate Particles at the LHC Jonathan L. Feng, Sky T. French, Christopher G. Lester, Yosef Nir, Yael Shadmi Phys. Rev. D 80, 114004 (2009) [7 pages] doi:10.1103/PhysRevD.80.114004 arXiv:0906.4215 Published by PRD.
Measuring the Higgs boson mass in dileptonic W-boson decays at hadron colliders Alan J. Barr, Ben Gripaios, Christopher Gorham Lester JHEP07(2009)072 doi:10.1088/1126-6708/2009/07/072 arXiv:0902.4864 Published by JHEP. Used at ATLAS in its official Higgs to WW search (ATLAS-COM-CONF-2010-084) on 2010 data and also documented here and here. See also a talk from Alan to that group. See also implementation code. Cited by ATLAS Higgs Discovery paper.
Measuring Smuon-Selectron Mass Splitting at the LHC and Patterns of Supersymmetry Breaking B.C. Allanach, J.P. Conlon, C.G. Lester PRD/v77/e076006 doi:10.1103/PhysRevD.77.076006 arXiv:0801.3666 [hep-ph] Published by PRD
The Standard Model and Supersymmetric Flavor Puzzles at the Large Hadron Collider Jonathan L. Feng, Christopher G. Lester, Yosef Nir, Yael Shadmi PRD/v77/e076002 doi:10.1103/PhysRevD.77.076002 arXiv:0712.0674 [hep-ph] Accepted by PRD
Weighing Wimps with Kinks at Colliders: Invisible Particle Mass Measurements from Endpoints Alan J. Barr, Ben Gripaios and Christopher G. Lester JHEP02(2008)014 doi:10.1088/1126-6708/2008/02/014 arXiv:0711.4008 [hep-ph] It made position 15 on the list of most-cited papers in the last two years, a list compiled in November 2010 by "sciencewatch.com", some kind of offshoot of Thomson Reuters. Locally referred to as BGL3.
MTGEN: Mass scale measurements in pair-production at colliders. Christopher G Lester, Alan J Barr JHEP12(2007)102 doi:10.1088/1126-6708/2007/12/102 arXiv:0708.1028 [hep-ph]
Natural priors, CMSSM fits and LHC weather forecasts B.C. Allanach, Kyle Cranmer, C.G. Lester, A.M. Weber JHEP08(2007)023 doi:10.1088/1126-6708/2007/08/023 arXiv:0705.0487 [hep-ph]
Sampling using a `bank' of clues B.C. Allanach, C.G. Lester doi:10.1016/j.cpc.2008.02.020 arXiv:0705.0486 [hep-ph] Accepted by Computer Physics Communications.
Three body kinematic endpoints in SUSY models with non-universal Higgs masses. C.G.Lester, M.A.Parker, M.J.White JHEP10(2007)051 doi:10.1088/1126-6708/2007/10/051 hep-ph/0609298 and SN-ATLAS-2006-058 in CDS Here is an old local link to the postscript which was useful when the paper was stuck somewhere in the ATLAS scientific note system ... . Asked ATLAS Secretariat to submit it to JHEP. They wrote to JHEP telling JHEP that we would submit the paper ourselves.
The Dark Side of mSUGRA B.C. Allanach, C.G. Lester, A.M. Weber JHEP12(2006)065 doi:10.1088/1126-6708/2006/12/065 hep-ph/0609295
Distinguishing Spins in Decay Chains at the Large Hadron Collider Christiana Athanasiou, Christopher G. Lester, Jennifer M. Smillie, Bryan R. Webber JHEP08(2006)055 doi:10.1088/1126-6708/2006/08/055 hep-ph/0605286 See also the addendum hep-ph/0606212 to the original form submitted the the archive hep-ph/0605286v1
Constrained invariant mass distributions in cascade decays: The Shape of the 'm(qll)-threshold' and similar distributions. C.G. Lester Physics Letters B, Volume 655, Issues 1-2, 25 October 2007, Pages 39-44. doi:10.1016/j.physletb.2007.08.061 hep-ph/0603171
Determining SUSY model parameters and masses at the LHC using cross-sections, kinematic edges and other observables Christopher G. Lester, Michael A. Parker, Martin J. White JHEP 01(2006)080 doi:10.1088/1126-6708/2006/01/080 hep-ph/0508143
Trackless ring identification and pattern recognition in Ring Imaging Cherenkov (RICH) detectors C. G. Lester Nucl. Instr. & Meth. A560/2 (2006) pp. 621-632 doi:10.1016/j.nima.2006.01.073 physics/0508034 The journal copy (NIMA) contains much more information (a whole new section) than the copy on the arXiv. Also, I later discovered that what I did is called a "Reversible jump Markov chain montecarlo by everyone else. See P J Green, Biometrika (1995), 82, 4, pp. 711-32, Reversible jump Markov chain Monte Carlo computation and Bayesian model determination
Multi-Dimensional mSUGRA Likelihood Maps B.C. Allanach, C.G. Lester Phys.Rev. D73 (2006) 015013 doi:10.1103/PhysRevD.73.015013 hep-ph/0507283
A variable for measuring masses at hadron colliders when missing energy is expected; mT2: the truth behind the glamour Barr, Alan; Lester, Christopher; Stephens, Phil J.Phys. G29 (2003) 2343-2363 doi:10.1088/0954-3899/29/10/304 hep-ph/0304226 Was originally entitled "mT2 : the truth behind the glamour" but the journal requested a more sombre title.
Discovering anomaly-mediated supersymmetry at the LHC A.J. Barr, B.C. Allanach, C.G. Lester, M.A. Parker, P. Richardson JHEP 03(2003)045 doi:10.1088/1126-6708/2003/03/045 hep-ph/0208214
Measuring supersymmetric particle masses at the LHC in scenarios with baryon number R-parity violating couplings. B.C. Allanach, A.J. Barr, L. Drage, C.G. Lester, D. Morgan, M.A. Parker, B.R. Webber, P. Richardson JHEP 0103:048,2001 doi:10.1088/1126-6708/2001/03/048 hep-ph/0102173
Measuring sparticle masses in nonuniversal string inspired models at the LHC. B.C. Allanach, C.G. Lester, M.A. Parker, B.R. Webber JHEP 09(2000)004 doi:10.1088/1126-6708/2000/09/004 hep-ph/0007009 This was the main paper to come from my thesis, though of course my thesis contains more information!
Measuring masses of semi-invisibly decaying particles pair produced at hadron colliders Lester, C. G.; Summers, D. J. Phys.Lett. B463 (1999) 99-103 doi:10.1016/S0370-2693(99)00945-4 hep-ph/9906349 This paper is about MT2 also known as the "Stransverse Mass". A simple C++ header file for calculating MT2 may be downloaded as an ancillary file attached to arXiv:1411.4312. See also the paper by Barr, Lester and Stephens. CMS usage ATLAS usage. Also here placing limits on stop production and here on charginos and neutralinos. Generic usage on spires. All ATLAS usage via spires.

In progress ... (ignore)

SUSY-2014-05: Electroweak SUSY summary paper glance
ATL-COM-PHYS-2013-911 Title Searching for direct gaugino production and direct slepton production with two leptons and missing transverse momentum at √s = 8 TeVSUSY-2013-11

Working group reports, conference proceedings, unpublished papers and other works ...

Properties of MT2 in the massless limit Colin H. Lally, Christopher G. Lester arXiv:1211.1542
Observations concerning the first ATLAS Blind Data Challenge A.J. Barr, F.M. Brochu, C.G. Lester, M. Palmer, A. Sabetfakhri ATL-PHYS-2004-021, ATL-COM-PHYS-2003-045 CDS record 1194858
A Storm in a 'T' Cup Barr, Khoo, Konar, Kong, Lester, Matchev, Park arXiv:1108.5182
Discovering heavy particles decaying into single boosted jets with substructure using the kT algorithm Cowden, CS (University of Cambridge) ; French, ST (University of Cambridge) ; Frost, JA (University of Cambridge) ; Lester, CG (University of Cambridge) ATL-PHYS-PUB-2009-076 ; ATL-COM-PHYS-2009-262 in the CERN Document Server
Discovering the lightest neutralino in R-Parity Violating SUSY with non zero lambda''112 using jet substructure and the kT algorithm Cowden, CS (University of Cambridge) ; French, ST (University of Cambridge) ; Frost, JA (University of Cambridge) ; Lester, CG (University of Cambridge) ATL-PHYS-INT-2009-039 ; ATL-COM-PHYS-2009-140 in the CERN Document Server
Les Houches "Physics at TeV Colliders 2008" Beyond the Standard Model Working Group: Summary Report
Full Supersymmetry Simulation for ATLAS in DC1 Biglietti, M; Brochu, F; Costanzo, D; De, F; Duchovni, E; Sen-Gupta, A; Hinchliffe, I; Lester, C G; Lipniacka, A; Loch, P; Lytken, E; Ma, H; Nielsen, J L; Paige, F; Polesello, F; Rajagopalan, S; Schrager, D; Stavropoulos, G; Tovey, D R; Wielers, M; CDS ATL-COM-PHYS-2003-055 ATL-PHYS-2004-011
Black hole production at the Large Hadron Collider. C.G. Lester Czech.J.Phys.54:A303-A310,2004 Prepared for Advanced Studies Institute: Physics at LHC (LHC-Praha-2003), Prague, Czech Republic, 6-12 Jul 2003.
Les Houches "Physics at TeV Colliders 2003" Beyond the Standard Model Working Group: Summary Report B. C. Allanach, A. Aranda, H. Baer, C. Balazs, M. Battaglia, G. Belanger, F. Boudjema, K. Desch, J. L. Diaz-Cruz, M. Dittmar, A. Djouadi, G. Dewhirst, D. Dominici, M. Escalier, L. Fano, S. Ferrag, S. Gascon-Shotkin, S. Gennai, R. Godbole, J. Guasch, M. Guchait, J. Gunion, S. Heinemeyer, J. Hewett, J. Kalinowski, K. Kawagoe, W. Kilian, J-L. Kneur, S. Kraml, R. Lafaye, B. Laforge, C. G. Lester, K. Mazumdar, Y. Mambrini, F. Moortgat, G. Moortgat-Pick, S. Moretti, M. Muhlleitner, A-S. Nicollerat, A. Nikitenko, M. Nojiri, T. Plehn, G. Polesello, W. Porod, D. Prieur, A. Pukhov, O. Ravat, P. Richardson, T. G. Rizzo, A. de Roeck, S. Schumann, P. Skands, P . Slavich, M. Spira, M. Spiropoulu, K. Sridhar, D. R. Tovey, G. Weiglein, J. D. Wells, D. Zerwas Published in *Les Houches 2003, Physics at TeV colliders* 171-289 hep-ph/0402295 My contribution was Section X: "Building on a Proposal for a New Reconstruction Technique for SUSY Processes at the LHC" -- aka "The Mass Relation Method"
A generic approach to the detector description in Atlas. C. Arnault Orsay, LAL S. Bentvelsen NIKHEF, Amsterdam S. Goldfarb Michigan U. M. Virchaux DAPNIA, Saclay C. Lester Cambridge U. Published in *CHEP 2000, Computing in high energy and nuclear physics* 269-272

Other papers

StransverseMassUtils : A Set of Athena Tools to Calculate mT2 Cowden, C S ; Lester, C G ATL-COM-SOFT-2010-004
Flavour Physics at the LHC French, ST ; Lester, CG ATL-COM-PHYS-2008-187
Endpoint formulae for the spartcile decay chain consisting of glunio->quark squark, followed by squark->quark neutralino2, followed by the three-body decay netrualino2->lepton lepton neutralino1. Ruth Freedman, C.G. Lester ATL-COM-PHYS-2007-086
ATLAS detector paper. Many authors! Draft is growing here Draft ...

Links to those of my publications which are recorded on the SLAC Spires server. Alternatively this broader query.

(Also the same for Allanach, Barr, Plehn. )

Links to those of my notes in the CERN Document Server (CDS).

a small non-empty subset of my talks

Published papers with very large author lists

Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics (a.k.a. "The ATLAS CSC Book") The ATLAS Collaboration In CDS or on the arXiv:0901.0512
The ATLAS Experiment at the CERN Large Hadron Collider The ATLAS Collaboration 2008 JINST 3 S08003 doi:10.1088/1748-0221/3/08/S08003 Note that the other LHC experiments are at here.
The Data Acquisition and Calibration System for the ATLAS Semiconductor Tracker A. Abdesselam et al 2008_JINST_3_P01003
Design and performance of the ABCD3TA ASIC for readout of silicon strip detectors in the ATLAS semiconductor tracker. F. Campabadal et al Nucl. Instr. & Methods A552, Issue 3 (Nov 2005), Pages 292-328 doi:10.1016/j.nima.2005.07.002
Beam tests of ATLAS SCT silicon strip detector modules F. Campabadala, et al Nucl. Instr. & Methods A538, Issue 1-3 (Feb 2005), Pages 384-407 doi:10.1016/j.nima.2004.08.133
GridPP: development of the UK computing Grid for particle physics The GridPP Collaboration J. Phys. G: Nucl. Part. Phys. 32 (2006) N1-N20 doi:10.1088/0954-3899/32/1/N01
The barrel modules of the ATLAS semiconductor tracker. A. Abdesselam et al Nucl.Instrum.Meth.A568:642-671,2006. doi:10.1016/j.nima.2006.08.036 ATL-COM-INDET-2006-009
The Optical Links of the ATLAS SemiConductor Tracker A. Abdesselam et al 2007_JINST_2_P09003 doi:10.1088/1748-0221/2/09/P09003 Copy of the paper on the SCT pubs page: here

Key

Colour Meaning
Cyan Unpublished
Yellow Thesis
White Peer reviewed publication
Light grey Peer reviewed publication

Gratifying citations

HIGGS

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