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1.
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Report from Working Group 3 : Beyond the Standard Model physics at the HL-LHC and HE-LHC
/ Cid Vidal, Xabier (Santiago de Compostela U., IGFAE) ; D'Onofrio, Monica (Liverpool U.) ; Fox, Patrick J (Fermilab) ; Torre, Riccardo (CERN ; INFN, Genoa) ; Ulmer, Keith A (Colorado U.) ; Aboubrahim, Amin (Northeastern U.) ; Albert, Andreas (RWTH Aachen U.) ; Alimena, Juliette (Ohio State U., Columbus (main)) ; Allanach, Benjamin C (Cambridge U., DAMTP) ; Alpigiani, Cristiano (Washington U., Seattle) et al.
This is the third out of five chapters of the final report [1] of the Workshop on Physics at HL-LHC, and perspectives on HE-LHC [2]. It is devoted to the study of the potential, in the search for Beyond the Standard Model (BSM) physics, of the High Luminosity (HL) phase of the LHC, defined as $3$ ab$^{-1}$ of data taken at a centre-of-mass energy of 14 TeV, and of a possible future upgrade, the High Energy (HE) LHC, defined as $15$ ab$^{-1}$ of data at a centre-of-mass energy of 27 TeV. [...]
arXiv:1812.07831; CERN-LPCC-2018-05.-
Geneva : CERN, 2019-12-02 - 281 p.
- Published in : CERN Yellow Rep. Monogr. 7 (2019) 585-865
Fulltext: PDF; arXiv: PDF; External link: Published Fulltext
In : HL/HE-LHC Workshop : Workshop on the Physics of HL-LHC, and Perspectives at HE-LHC, Geneva, Switzerland, 18 - 20 Jun 2018
Report on the Physics at the HL-LHC, and Perspectives for the HE-LHC, Geneva, Switzerland, 18 - 20 Jun 2018, pp.585-865
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2.
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Enhancing the discovery prospects for SUSY-like decays with a novel kinematic variable
/ Debnath, Dipsikha (Florida U. ; Rutgers U., Piscataway) ; Gainer, James S. (Hawaii U.) ; Kilic, Can (Texas U.) ; Kim, Doojin (CERN ; Arizona U.) ; Matchev, Konstantin T. (Florida U.) ; Yang, Yuan-Pao (Texas U.)
The lack of a new physics signal thus far at the Large Hadron Collider motivates us to consider how to look for challenging final states, with large Standard Model backgrounds and subtle kinematic features, such as cascade decays with compressed spectra. Adopting a benchmark SUSY-like decay topology with a four-body final state proceeding through a sequence of two-body decays via intermediate resonances, we focus our attention on the kinematic variable $\Delta_{4}$ which previously has been used to parameterize the boundary of the allowed four-body phase space. [...]
arXiv:1809.04517; UTTG-09-18; CERN-TH-2018-203; UH-511-2018-1295.-
2019-05-02 - 20 p.
- Published in : JHEP 05 (2019) 008
Article from SCOAP3: PDF; Fulltext: PDF;
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3.
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Adding Pseudo-Observables to the Four-Lepton Experimentalist's Toolbox
/ Gainer, James S. (Hawaii U.) ; González-Alonso, Martín (CERN) ; Greljo, Admir (U. Mainz, PRISMA ; Mainz U., Inst. Phys. ; Sarajevo U.) ; Isaković, Senad (Sarajevo U.) ; Isidori, Gino (Zurich U.) ; Korytov, Andrey (Florida U.) ; Lykken, Joseph (Fermilab) ; Marzocca, David (INFN, Trieste) ; Matchev, Konstantin T. (Florida U.) ; Milenović, Predrag (CERN) et al.
The "golden" channel, in which the newly-discovered Higgs boson decays to four leptons by means of intermediate vector bosons, is important for determining the properties of the Higgs boson and for searching for subtle new physics effects. Different approaches exist for parametrizing the relevant Higgs couplings in this channel; here we relate the use of pseudo-observables to methods based on specifying the most general amplitude or Lagrangian terms for the $HVV$ interactions. [...]
arXiv:1808.00965; CERN-TH-2018-178; FERMILAB-PUB-18-332-CD; UH-511-1255-18.-
2018-10-10 - 33 p.
- Published in : JHEP 10 (2018) 073
Article from SCOAP3: PDF; Fulltext: 1808.00965 - PDF; fermilab-pub-18-332-cd - PDF; External link: Fermilab Library Server (fulltext available)
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4.
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Detecting kinematic boundary surfaces in phase space and particle mass measurements in SUSY-like events
/ Debnath, Dipsikha (Florida U.) ; Gainer, James S. (Hawaii U.) ; Kilic, Can (Texas U. ; Texas U., TCC) ; Kim, Doojin (CERN ; Florida U.) ; Matchev, Konstantin T. (Florida U.) ; Yang, Yuan-Pao (Texas U. ; Texas U., TCC)
We critically examine the classic endpoint method for particle mass determination, focusing on difficult corners of parameter space, where some of the measurements are not independent, while others are adversely affected by the experimental resolution. In such scenarios, mass differences can be measured relatively well, but the overall mass scale remains poorly constrained. [...]
arXiv:1611.04487; CERN-TH-2016-235; UTTG-21-16.-
Geneva : CERN, 2017-06-19 - 52 p.
- Published in : JHEP 1706 (2017) 092
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: source - ZIP; arXiv:1611.04487 - PDF; CERN-TH-2016-235 - PDF;
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5.
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6.
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OPTIMASS: A Package for the Minimization of Kinematic Mass Functions with Constraints
/ Cho, Won Sang (Florida U. ; IBS, Daejeon, CTPU) ; Gainer, James S. (Florida U.) ; Kim, Doojin (Florida U.) ; Lim, Sung Hak (IBS, Daejeon, CTPU ; KAIST, Taejon) ; Matchev, Konstantin T. (Florida U.) ; Moortgat, Filip (CERN) ; Pape, Luc (CERN) ; Park, Myeonghun (APCTP, Pohang ; POSTECH, Pohang ; Tokyo U., IPMU)
Reconstructed mass variables, such as $M_2$, $M_{2C}$, $M_T^\star$, and $M_{T2}^W$, play an essential role in searches for new physics at hadron colliders. The calculation of these variables generally involves constrained minimization in a large parameter space, which is numerically challenging. [...]
arXiv:1508.00589; CTPU-15-09; APCTP-PRE2015-020; IPMU15-0115; CTPU-15-09; APCTP-PRE2015-020; IPMU15-0115.-
2016-01-07 - 38 p.
- Published in : JHEP 01 (2016) 026
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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7.
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Improving the sensitivity of stop searches with on-shell constrained invariant mass variables
/ Cho, Won Sang (Florida U. ; IBS, Daejeon, CTPU) ; Gainer, James S. (Florida U.) ; Kim, Doojin (Florida U.) ; Matchev, Konstantin T. (Florida U.) ; Moortgat, Filip (CERN) ; Pape, Luc (CERN) ; Park, Myeonghun (Tokyo U., IPMU ; APCTP, Pohang ; POSTECH)
The search for light stops is of paramount importance, both in general as a promising path to the discovery of beyond the standard model physics and more specifically as a way of evaluating the success of the naturalness paradigm. While the LHC experiments have ruled out much of the relevant parameter space, there are "stop gaps", i.e., values of sparticle masses for which existing LHC analyses have relatively little sensitivity to light stops. [...]
arXiv:1411.0664; CTPU-14-11; APCTP-PRE2014-014; IPMU14-0333; CTPU-14-11; APCTP PRE2014 - 014; IPMU14-0333.-
2015-05-07 - 50 p.
- Published in : JHEP 05 (2015) 040
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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8.
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9.
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The role of interference in unraveling the ZZ-couplings of the newly discovered boson at the LHC
/ Chen, Mingshui (Florida U.) ; Cheng, Tongguang (Florida U.) ; Gainer, James S (Florida U.) ; Korytov, Andrey (Florida U.) ; Matchev, Konstantin T (Florida U.) ; Milenovic, Predrag (Florida U.) ; Mitselmakher, Guenakh (Florida U.) ; Park, Myeonghun (CERN) ; Rinkevicius, Aurelijus (Florida U.) ; Snowball, Matthew (Florida U.)
We present a general procedure for measuring the tensor structure of the coupling of the scalar Higgs-like boson recently discovered at the LHC to two Z bosons, including the effects of interference among different operators. To motivate our concern with this interference, we explore the parameter space of the couplings in the effective theory describing these interactions and illustrate the effects of interference on the differential dilepton mass distributions. [...]
arXiv:1310.1397; CERN-PH-TH-2013-164.-
2014 - 29 p.
- Published in : Phys. Rev. D 89 (2014) 034002
APS published version, local copy: PDF; External link: Preprint
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10.
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The Matrix Element Method: Past, Present, and Future
/ Gainer, James S. (U. Florida, Gainesville (main)) ; Lykken, Joseph (Fermilab) ; Matchev, Konstantin T. (U. Florida, Gainesville (main)) ; Mrenna, Stephen (Fermilab) ; Park, Myeonghun (CERN)
The increasing use of multivariate methods, and in particular the Matrix Element Method (MEM), represents a revolution in experimental particle physics. [...]
CERN-PH-TH-2013-165 ; FERMILAB-FN-0963-CD-T ; arXiv:1307.3546 ; CERN-PH-TH-2013-165 ; FERMILAB-FN-0963-CD-T.
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2013. - 3 p.
PDF on ECONF - Proceedings write-up on ECONF - FERMILABFN - Full text - Preprint
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