Summary
Purpose of this note is to propose a search for typical signatures produced by charginos, neutralinos and sleptons on the basis of two supergravity model predictions, at the highest e+ e− energy which will be available with LEP-II. The typical signatures are of two main classes: i) «pure leptonic» states; ii) «mixed lepton-jets» states. The «pure leptonic» states consist of acoplanardi-leptons with «leading» and «non-leading» leptonic components plusmulti-di-lepton states. All with at least two missing momenta. The «mixed lepton-jets» states contain at least two jets and one or three leptons plus missing momenta. All these final states represent clear signatures for SUSY. Cross-sections and branching ratios are computed using two «local» supersymmetry models:i.e. the minimalSU(5) supergravity and theSU(5)×U(1) supergravity. The corresponding numbers of «pure leptonic» and of «mixed lepton-jets» final states are computed. We also discuss the upgrading needed in an experimental set-up at LEP-II especially suited for the detection of the supersymmetry signals expected on the basis of the two supergravity models quoted. These models are at present the most reliable in terms of physically sound assumptions.
Similar content being viewed by others
References
J. Ellis, S. Kelley andD. V. Nanopoulos:Phys. Lett. B,249, 441 (1990);Phys. Lett. B,260, 131 (1991);P. Langacker andM.-X. Luo:Phys. Rev. D,44, 817 (1991);F. Anselmo, L. Cifarelli, A. Peterman andA. Zichichi:Nuovo Cimento A,104, 1817 (1991).
M. Matsumoto, J. Arafune, H. Tanaka andK. Shirashi:Phys. Rev. D,46, 3966 (1992).
R. Arnowitt andP. Nath:Phys. Rev. Lett.,69, 725 (1992);P. Nath andR. Arnowitt:Phys. Lett. B,287, 89 (1992);289, 368 (1992).
J. L. Lopez, D. V. Nanopoulos andH. Pois: Texas A & M University preprint CTP-TAMU-61/92 and CERN-TH.6628/92 (to appear inPhys. Rev. D).
J. Hisano, H. Murayama andT. Yanagida:Phys. Rev. Lett.,69, 1014 (1992) and Tohoku University preprint TU-400 (July 1992).
J. L. Lopez, D. V. Nanopoulos, H. Pois andA. Zichichi:Phys. Lett. B,299 262 (1993).
J. L. Lopez, D. V. Nanopoulos andA. Zichichi:Phys. Lett. B,291, 255 (1992).
R. Arnowitt andP. Nath: Texas A & M University preprint CTP-TAMU-65, 66/92 and NUB-TH3055, 3056/92.
J. L. Lopez, D. V. Nanopoulos andA. Zichichi: Texas A & M University preprint CTP-TAMU-68/92, CERN-TH.6667/92 and CERN-PPE/92-188.
J. L. Lopez, D. V. Nanopoulos, X. Wang andA. Zichichi: Texas A & M University perprint CTP-TAMU-76/92, CERN/LAA/92-023 and CERN-PPE/92-194.
E. Cremmer, S. Ferrara, C. Kounnas andD. V. Nanopoulos:Phys. Lett. B,133, 61 (1983).
J. Ellis, A. B. Lahanas, D. V. Nanopoulos andK. Tamvakis:Phys. Lett. B,134, 429, (1984).
J. Ellis, C. Kounnas andD. V. Nanopoulos:Nucl. Phys. B,247, 373 (1984).
E. Witten:Phys. Lett. B,155, 151 (1986).
A. Bartl, H. Fraas andW. Majerotto:Z. Phys. C,30, 441 (1986).
C. Dionisi et al.: inProceedings of the ECFA Workshop on LEP 200, Aachen, 1986, edited byA. Böhm andW. Hoogland, p. 380.
M. Chen, C. Dionisi, M. Martinez andX. Tata:Phys. Rep.,159, 201 (1988).
M. Felcini: inTen Years of SUSY confronting experiment, CERN-TH.6707/92-PPE/92-180 (November 1992).
J.-F. Grivaz: LAL preprint 92-64.
J. L. Lopez, D. V. Nanopoulos, H. Pois, X. Wang andA. Zichichi: Texas A & M University preprint CTP-TAMU-05/93.
A. Bartl, H. Fraas andW. Majerotto:Z. Phys. C,34, 411 (1987).
S. Katsanevas: talk given at the1993 Aspen Winter Conference.
J. Ellis, D. V. Nanopoulos andK. Olive: Texas A & M University preprint CTP-TAMU-75/92 and CERN-TH.6721/92.
T. Schimert, C. Burgess andX. Tata:Phys. Rev. D,32, 707 (1985);T. Schimert andX. Tata:Phys. Rev. D,32, 721 (1985).
C. D'Ambrosio, H. Leutz, T. Shimizu andO. Shinji:Nucl. Instrum. Methods A,325, 161 (1993).
H. Beker et al.: preprint CERN/ECP 92-18, 28 October 1992.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Anselmo, F., Anzivino, G., Arzarello, F. et al. AcoplanarDi-leptons andMixed events on the basis of two supergravity model predictions. Nuov Cim A 106, 1389–1426 (1993). https://doi.org/10.1007/BF02785626
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02785626