Experimental observation of lepton pairs of invariant mass around 95 GeV/c2 at the CERN SPS collider

Cline, D.; Fruehwirth, Rudolf; Mohammadi, M.; Strauss, J.; Szonsco, F.; Wahl, H. D.; Wulz, C.-E.; Dau, D.; Fincke, M.; Hertzberger, L.O.; Holthuizen, D.; Tao, C.; Eijk, B. Van; Muirhead, H.; Aubert, B.; Catz, P.; Ghez, Ph.; Gonidec, A.; Lees, J. P.; Linglin, D.; Minard, M.-N.; Yvert, M.; Colás, J.; Bezauget, A.; Boeck, R.; Calvetti, M.; Cennini, P.; Centro, S.; Cittolin, S.; Dallmann, D.; Negra, M. Della; Demoulin, M.; Ellis, N.; Hoffmann, H.; Jank, W.; Jorat, G.; Markiewicz, T.; Maurin, G.; Müller, F.; Naumann, L.; Norton, A.; Pauß, F.; Placci, A.; Porte, J. P.; Revol, J. P.; Rijssenbeek, M.; Rohlf, J.; Rossi, Paolo; Rubbia, C.; Sadoulet, B.; Schinzel, D.; Sumorok, K.; Timmer, J.; Vialle, J.P.; Vuillemin, V.; Xie, Gaogang; Zurfluh, E.; Bowcock, T. J. V.; Eisenhandler, E.; Gibson, W. R.; Honma, A.; Kalmus, P. I. P.; Keeler, R.; Salvi, G.; Thompson, G.; Dobrzyński, L.; Fontaine, G.; Geer, S.; Ghesquière, C.; Giraud‐Héraud, Y.; Kryn, D.; Mendiburu, J. P.; Orkin-Lecourtois, A.; Sajot, G.; Vrána, J.; Arnison, G.; Astbury, A.; Grayer, G.; Haynes, W.J.; Nandi, A.; Roberts, Craig D.; Scott, W. G.; Shah, T.; Denegri, D.; Givernaud, A.; Lévêque, A.; Locci, E.; Malosse, J. J.; Rich, J.; Sass, J.; Saudraix, J.; Savoy-Navarro, A.; Eggert, K.; Erhard, P.; Faissner, H.; Giboni, Karl; Hansl‐Kozanecka, T.; Hoffmann, D.; Lehmann, Harry; Leuchs, R.; Rademacher, E.; Reithler, H.; Tscheslog, E.; Corden, M.; Dowell, J. D.; Garvey, J.; Homer, R. J.; Kenyon, I. R.; McMahon, T. J.; Streets, J.; Watkins, P. M.; Wilson, J. A.; Karimaeki, V.; Kinnunen, R.; Pietarinen, E.; Primiae, M.; Tuominiemi, J.; Frey, R.; Hodges, C.; Kernan, A.; Kozanecki, W.; Morgan, K.; Ransdell, J.; Smith, D.; Ceradini, F.; Diciaccio, A.; DiBitonto, D.; Lacava, F.; Moricca, M.; Paoluzi, L.; Piano-Mortari, G.; Salvini, G.

doi:10.1016/0370-2693(83)90188-0

Cited by 681 publications

(203 citation statements)

References 19 publications

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“…Since this time it has achieved remarkable success with the discovery, as predicted by the model of the tau lepton [1] along with the charm [2,3] and bottom quarks [4] in the 1970s, the W and Z bosons in the 1980s [5][6][7], the top quark in the 1990s [8] and the tau neutrino in 2000 [9]. The final particle in the standard model, the Higgs boson was discovered at CERN in July 2012 [10,11], completing the set of particles predicted by the SM.…”

Section: The Standard Modelmentioning

confidence: 99%

Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

Thomas¹

2016

Springer Theses

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In this thesis I study the collider phenomenology of BSM physics at the LHC, concentrating on the Higgs boson and supersymmetery. The implications and effects on cross sections of the loss of unitarity in scattering processes involving multiple vector bosons and/or the Higgs, when the Higgs couplings to the W and the Z are non-SM, is studied using an effective Lagrangian. Subsequently methods to remove unwanted background from transversely polarised vector bosons are explored, which enable an estimation of the potential to measure the Higgs couplings to weak bosons in a model-independent way via vector boson fusion. MSSM effects on Higgs production and decay are also considered, concentrating on the effects due to light stops, sbottoms and staus. Amongst other things, we find that light 3 rd generation squarks generally produce asymmetrical alteration in signal strengths of different production channels, generally causing µ V BF µ ggF > 1. Finally we extend some ATLAS analyses in the low ∆m = mt − mχ0 1 region, extending the excluded masses of light stops. This enables us to limit the maximum effects of light stops on the Higgs, and further limits the parameter space where the light stop scenario of electroweak baryogenesis is viable.

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Section: The Standard Modelmentioning

confidence: 99%

Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

Thomas¹

2016

Springer Theses

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“…In the 1980's CERN discovered the W and Z [4,5], while later in the 1990's the top quark was observed at Fermilab [6,7]. Aside from the Higgs, these particles complete what is expected from the Standard Model.…”

Section: List Of Tablesmentioning

confidence: 98%

Measurement of the relative fraction of t$\bar{t}$ events produced via gluon fusion in p$\bar{p}$ collision at √s = 1.96 TeV at CDF

Yamaoka

2007

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In this thesis we present a measurement of the relative fraction of tt events produced via gluon-fusion to the total number of tt events. Using the kinematics of the production and decay of the top and antitop quark pair, we trained a Neural Network to discriminate the gluon-fusion events. The Neural Network was then used as a template to fit for the gluon-fusion fraction in data. Using a total integrated luminosity of 955 pb −1 we find σ(gg→tt) σ(pp→tt) < 0.33 at 68% confidence level and σ(gg→tt) σ(pp→tt) < 0.61 at 95% confidence level.ii

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“…Also for the Z no trials factor was applicable, due to the unicity of the signature. The article describing the find makes no mention of statistical checks [5], but it notes that background sources had been estimated to be negligible.…”

Section: How 5σ Became a Standardmentioning

confidence: 99%

Extraordinary claims: the 0.000029% solution

Dorigo¹

2015

EPJ Web of Conferences

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Abstract. The five-standard-deviation threshold is an established standard for discovery claims in experimental particle physics; however, the criterion is an ad-hoc recipe with no solid foundations. In this report I discuss its origins and the issues it was designed to address, pointing out its shortcomings and the need for a more flexible approach to decide when a new observed effect should be taken seriously.

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Experimental observation of lepton pairs of invariant mass around 95 GeV/c2 at the CERN SPS collider

Cited by 681 publications

References 19 publications

Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

Measurement of the relative fraction of t$\bar{t}$ events produced via gluon fusion in p$\bar{p}$ collision at √s = 1.96 TeV at CDF

Extraordinary claims: the 0.000029% solution

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