Abstract
We investigate squark and gluino pair production at LHC (CMS) with subsequent decays into quarks, leptons, and the lightest supersymmetric particles (LSP) in models with effective supersymmetry, where the third generation of squarks is relatively light, whilst the first two generations of squarks are heavy. We consider the general case of nonuniversal gaugino masses. The visibility of a signal through an excess over Standard Model background in (n≥2) jets+(m≥0) leptons+E missT events depends rather strongly on the relation between the LSP, second-neutralino, gluino, and squark masses and decreases with increasing LSP mass. We find that, for a relatively heavy gluino, it is very difficult to detect a SUSY signal even for light third-generation squarks \((m_{\tilde q_3 } \leqslant 1TeV)\) if the LSP mass is close to the third-generation squark mass.
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References
S. Abdullin et al., CMS NOTE 1998/006.
R. Barbieri et al., Nucl. Phys. B 367, 28 (1993); H. Baer, C. Chen, F. Paige, and X. Tata, Phys. Rev. D 50, 2148 (1994); 52, 2746 (1995); 53, 6241 (1996).
R. Barbieri, Riv. Nuovo Cimento 11, 1 (1988); A. B. Lahanas and D. V. Nanopoulos, Phys. Rep. 145, 1 (1987); H. E. Haber and G. L. Kane, Phys. Rep. 117, 75 (1985); H. P. Nilles, Phys. Rep. 110, 1 (1984); N. V. Krasnikov and V. A. Matveev, Fiz. Élem. Chastits At. Yadra 28, 1125 (1997) [Phys. Part. Nucl. 28, 441 (1997)].
S. I. Bityukov and N. V. Krasnikov, Phys. Lett. B 469, 149 (1999); Nuovo Cimento A 112, 913 (1999).
M. Dine, A. Kagan, and D. Samuel, Phys. Lett. B 243, 250 (1990); A. G. Cohen, D. B. Kaplan, and A. E. Nelson, Phys. Lett. B 243, 588 (1990); J. Bagger, J. L. Feng, and N. Polonsky, Nucl. Phys. B 563, 3 (1999).
S. I. Bityukov and N. V. Krasnikov, hep-ph/0005246; in Proceedings of the International Seminar “Quarks-2000” (in press).
B. C. Allanach, J. J. van der Bij, A. Dedes, et al., J. Phys. G 26, 1 (2000).
U. Chattopadhyay, Am. Datta, An. Datta, et al., Phys. Lett. B 493, 127 (2000).
V. S. Kaplunovsky and J. Louis, Phys. Lett. B 306, 269 (1993).
N. Polonsky and A. Pomarol, Phys. Rev. Lett. 73, 2292 (1994).
N. V. Krasnikov and V. V. Popov, hep-ph/9611298.
C. Kolda and J. March-Russell, Phys. Rev. D 55, 4252 (1997).
H. Baer, M. A. Diaz, P. Quintana, and X. Tata, JHEP 0004, 016 (2000).
S. Abdullin, A. Khanov, and N. Stepanov, CMS NOTE TN/94-180 (1994).
H. Baer, F. Paige, S. Protopopescu, and X. Tata, Preprint No. EP-930329 (Florida State University, 1993).
T. Sjostrand, Preprint CERN-TH.7112193 (Geneva, 1993).
S. I. Bityukov and N. V. Krasnikov, Mod. Phys. Lett. A 13, 3235 (1998); Nucl. Instrum. Methods Phys. Res. A 452, 518 (2000).
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From Yadernaya Fizika, Vol. 65, No. 7, 2002, pp. 1374–1384.
Original English Text Copyright © 2002 by Bityukov, Krasnikov.
This article was submitted by the authors in English.
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Bityukov, S.I., Krasnikov, N.V. LHC (CMS) discovery potential for models with effective supersymmetry and nonuniversal gaugino masses. Phys. Atom. Nuclei 65, 1341–1351 (2002). https://doi.org/10.1134/1.1495646
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DOI: https://doi.org/10.1134/1.1495646