Experimental Search for Chargino and Neutralino Production in Supersymmetry Models with a Light Gravitino

Abbott, B.; Abolins, M.; Acharya, B. S.; Адам, И.; Adams, T.; Adams, M. R.; Ahn, Shihyun; Aihara, H.; Alves, G. A.; Amidi, E.; Amos, N.; Anderson, E. W.; Astur, R.; Baarmand, M. M.; Baden, A.; Balamurali, V.; Balderston, J.; Baldin, B.; Banerjee, S.; Bantly, J.; Bartlett, J. F.; Bazizi, K.; Belyaev, A.; Beri, S. B.; Bertram, I.; Bezzubov, V. A.; Bhat, P. C.; Bhatnagar, V.; Bhattacharjee, M.; Biswas, N. N.; Blazey, G.; Blessing, S.; Bloom, P. C.; Boehnlein, A.; Bojko, N. I.; Borcherding, F.; Boswell, C.; Brandt, A.; Brock, R.; Bross, A.; Buchholz, D.; Буртовой, В. С.; Butler, J. M.; Carvalho, W.; Casey, D.; Casilum, Z.; Castilla‐Valdez, H.; Chakraborty, D.; Chang, S. M.; Chekulaev, S. V.; Chen, L.-P.; Chen, W.; Choi, Sung Wook; Chopra, S.; Choudhary, B. C.; Christenson, J. H.; Chung, M.; Claes, D. R.; Clark, A. R.; Cobau, W. G.; Cochran, J.; Cooper, W. E.; Cretsinger, C.; Cullen-Vidal, D.; Cummings, M. A.C.; Ćutts, D.; Dahl, O. I.; Davis, K.; De, K.; Signore, K. Del; Demarteau, M.; Denisov, D.; Denisov, S. P.; Diehl, H. T.; Diesburg, M.; Loreto, G. Di; Draper, P.; Ducros, Y.; Dudko, L.; Dugad, S.; Edmunds, D.; Ellison, J.; Elvira, V. D.; Engelmann, R.; Eno, S. C.; Eppley, G.; Ermolov, P.; Eroshin, O. V.; Евдокимов, В. Н.; Fahland, T.; Fatyga, M.; Featherly, J.; Fehér, S.; Fein, D.; Ferbel, T.; Finocchiaro, G.; Fisk, H. E.; Fisyak, Y.; Flattum, E.; Forden, G. E.; Fortner, M.; Frame, K. C.; Fuess, S.; Gallas, E. J.; Galyaev, A. N.; Gartung, P.; Geld, T. L.; Genik, R. J.; Genser, K.; Gerber, C. E.; Gibbard, B.; Glenn, S.; Gobbi, B.; Goforth, M.; Goldschmidt, A.; Gómez, B.; Gómez, G.; Goncharov, P. I.; Solís, J. L. González; Gordon, H. A.; Goss, L. T.; Gounder, K.; Goussiou, A. G.; Graf, N.; Grannis, P. D.; Green, D. R.; Green, J.; Greenlee, H.; Grim, G.; Grinstein, S.; Grossman, N.; Grudberg, P.; Grünendahl, S.; Guglielmo, G.; Guida, J. A.; Guida, J. M.; Gupta, A.; Gurzhiev, S. N.; Gutiérrez, P.; Gutnikov, Y. E.; Hadley, N. J.; Haggerty, H.; Hagopian, S.; Hagopian, V.; Hahn, K. S.; Hall, R. E.; Hanlet, P.; Hansen, S.; Hauptman, J. M.; Hedin, D.; Heinson, A. P.; Heintz, U.; Hernández-Montoya, R.; Heuring, T.; Hirosky, R.; Hobbs, J.; Hoeneisen, B.; Hoftun, J. S.; Hsieh, F.; Hu, Ting; Hu, Tong; Huehn, T.; Ito, A. S.; James, E.; Jaques, J.; Jerger, S. A.; Jesik, R.; Jiang, Jun; Joffe–Minor, T.; Johns, K. A.; Johnson, Mark D.; Jonckheere, A.; Jones, M.; Jöstlein, H.; Jun, S. Y.; Jung, C. K.; Kahn, S.; Kalbfleisch, G.; Kang, J. S.; Kehoe, R.; Kelly, M.; Kim, C. L.; Kim, S. K.; Klatchko, A.; Klima, B.; Klopfenstein, C.; Klyukhin, V.; Kochetkov, V.; Kohli, J. M.; Koltick, D.; Kostritskiy, A. V.; Kotcher, J.; Kotwal, A.; Kourlas, J.; Kozelov, A. V.; Kozlovski, E. A.; Krane, J.; Krishnaswamy, M. R.; Krzywdziński, S.; Kunori, S.; Lami, S.; Lan, H.; Lander, R.; Landry, F.; Landsberg, G.; Lauer, B.; Leflat, A.; Li, H.; Li, J.; Li-Demarteau, Q. Z.; Lima, J. 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Z.; Raja, R.; Rajagopalan, S.; Ramírez, O.; Rasmussen, L.; Reucroft, S.; Rijssenbeek, M.; Rockwell, T.; Roe, N. A.; Rubinov, P.; Ruchti, R.; Rutherfoord, J. P.; Sánchez-Hernández, A.; Santoro, A.; Sawyer, L.; Schamberger, R. D.; Schellman, H.; Sculli, J.; Shabalina, E.; Shaffer, C.; Shankar, H. C.; Shivpuri, R. K.; Shupe, M. A.; Singh, H.; Singh, Jagbir; Sirotenko, V.; Smart, W.; Smith, R. P.; Snihur, R.; Snow, G. R.; Snow, J.; Snyder, S.; Solomon, J.; Sood, P. M.; Sosebee, M.; Sotnikova, N.; Souza, M.; Spadafora, A. L.; Stephens, R. W.; Stevenson, M. L.; Stewart, David J.; Stichelbaut, F.; Stoianova, D. A.; Stoker, D. P.; Strauss, M.; Streets, K.; Strovink, M.; Sznajder, A.; Tamburello, P.; Tarazi, J.; Tartaglia, M.; Thomas, T. L.; Thompson, J.; Trippe, T. G.; Tuts, P. M.; Varelas, N.; Varnes, E. W.; Vititoe, D.; Volkov, A.; Vorobiev, A. P.; Wahl, H. D.; Wang, G.; Warchol, J.; Watts, G.; Wayne, M.; Weerts, H.; White, A.; White, J. T.; Wightman, J. A.; Willis, S.; Wimpenny, S.; Wirjawan, J. V.D.; Womersley, J.; Won, E.; Wood, D.; Xu, H.; Yamada, R.; Yamin, P.; Yanagisawa, C.; Yang, J.; Yasuda, T.; Yepes, P.; Yoshikawa, C.; Youssef, S.; Yu, J.; Yu, Y.; Zhu, Z. H.; Ziemińska, D.; Ziemiński, A.; Zverev, E. G.; Zylberstejn, A.

doi:10.1103/physrevlett.80.442

Cited by 39 publications

(18 citation statements)

References 26 publications

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“…The only physical background process is W γ, which is rather rare, so the typical backgrounds will involve photon/lepton misidentification and/or E T mismeasurement. Note that in contrast to the minimal gauge-mediated models, our type 1 models are not associated with any di-photon signatures [35], because the neutralino pair-production cross-sections are suppressed, while the chargino decay does not yield a photon.…”

Section: Su (2)-neutralino Nlspmentioning

confidence: 85%

Generic and chiral extensions of the supersymmetric standard model

1999

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We construct extensions of the Standard Model in which the gauge symmetries and supersymmetry prevent the dangerously large effects that may potentially be induced in a supersymmetric standard model by Planck scale physics. These include baryon number violation, flavor changing neutral currents, the µ term, and masses for singlet or vector-like fields under the Standard Model gauge group. For this purpose we introduce an extra non-anomalous U(1) µ gauge group. Dynamical supersymmetry breaking in a secluded sector triggers the breaking of the U(1) µ and generates soft masses for the superpartners via gauge mediation, with the scalars possibly receiving sizable contributions from the U(1) µ D-term. We find several classes of complete and calculable models, in which the messengers do not present cosmological problems and neutrino masses can also be accomodated. We derive the sparticle spectrum in these models and study the phenomenological consequences. We give an exhaustive list of the potential experimental signatures and discuss their observability in the upcoming Tevatron runs. One class of models exhibits interesting new discovery channels, namely W W E T , W γ E T and W Z E T , which arise when the next-to-lightest supersymmetric particle is a short-lived SU(2)

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Section: Su (2)-neutralino Nlspmentioning

confidence: 85%

Generic and chiral extensions of the supersymmetric standard model

1999

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“…1 of Ref. [21], we estimate the inclusive 2γ+ E T > 40 GeV (60 GeV) background level (for E T (γ 1 , γ 2 ) > (20 GeV, 12 GeV)) to correspond to ∼ 0.9 (0.1) event in their data sample of ∼ 100 pb −1 . The background from jet mismeasurement, of course, falls steeply with E T .…”

Section: A Model Line A: the Bino Nlsp Scenariomentioning

confidence: 94%

“…As we have mentioned, it may be possible to further reduce the background by hardening the E T (γ) and E T requirements with only modest loss of signal. The background may also be reduced if jet/lepton misidentification as a photon is considerably smaller than in Run I [21]. If we optimistically assume that the reach is given by the 5 (10) event level at the Main Injector (TeV33), we would be led to conclude that experiments may probe Λ values as high as 118 TeV (145 TeV) at these facilities.…”

Section: A Model Line A: the Bino Nlsp Scenariomentioning

confidence: 99%

“…We expect that the backgrounds are smallest in the two photon channel, which we will mainly focus on for the purpose of assessing the reach. We have not attempted to assess the background because the recent analysis by the D0 collaboration [21], searching for charginos and neutralinos in the GMSB framework, points out that the major portion of the background arises from mismeasurement of QCD jets and for yet higher values of E T from misidentification of jets/leptons as photons. In other words, this background is largely instrumental, and hence rather detector-dependent.…”

Section: A Model Line A: the Bino Nlsp Scenariomentioning

confidence: 99%

“…4. The physics background to the γγ event topologies is very small, and detector-dependent instrumental backgrounds (such as from jets being mis-identified as photons or leptons, or large mismeasurement of transverse energies) dominate [21]. Even with a conservative estimate of 1 f b for the background cross section, experiments at the MI (TeV33) should be able to probe values of the model parameter Λ out to 110 TeV (130 TeV).…”

Section: Summary and Concluding Remarksmentioning

confidence: 99%

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Reach of Fermilab Tevatron upgrades in gauge-mediated supersymmetry breaking models

et al. 1999

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We examine signals for sparticle production at the Tevatron within the framework of gauge mediated supersymmetry breaking models for four different model lines, each of which leads to qualitatively different signatures. We identify cuts to enhance the signal above Standard Model backgrounds, and use ISAJET to evaluate the SUSY reach of experiments at the Fermilab Main Injector and at the proposed TeV33. For the model lines that we have examined, we find that the reach is at least as large, and frequently larger, than in the mSUGRA framework. For two of these model lines, we find that the ability to identify b-quarks and τ -leptons with high efficiency and purity is essential for the detection of the signal.

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Observable signals of gauge-mediated supersymmetry breaking

Mukhopadhyaya

1998

Pramana - J Phys

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Experimental Search for Chargino and Neutralino Production in Supersymmetry Models with a Light Gravitino

Cited by 39 publications

References 26 publications

Generic and chiral extensions of the supersymmetric standard model

Generic and chiral extensions of the supersymmetric standard model

Reach of Fermilab Tevatron upgrades in gauge-mediated supersymmetry breaking models

Observable signals of gauge-mediated supersymmetry breaking

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