Much ado about leptoquarks: A comprehensive analysis

Physical Review D - Particles, Fields, Gravitation and Cosmology

Volumn 56, Issue 9, 1997, Pages 5709-5724

  Hewett, JoAnne L ^a   Rizzo, Thomas G ^a  

^a SLAC NATIONAL ACCELERATOR LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001503343     PISSN: 15507998     EISSN: 15502368     Source Type: Journal    
DOI: 10.1103/PhysRevD.56.5709     Document Type: Article

References (138)

1. See, for example, B. Schremp and F. Schremp, Phys. Lett. 153B, 101 (1985).
2. L. F. Abbott and E. Farhi, Phys. Lett. 101B, 69 (1981).
3. S. Pakvasa, Int. J. Mod. Phys. A 2, 1317 (1987).
4. For a review, see, K. Lane, lectures given at Theoretical Advanced Study Institute (TASI93) in Elementary Particle Physics, Boulder, CO, 1993, hep-ph/9401324.
5. H. Georgi and S. L. Glashow, Phys. Rev. Lett. 32, 438 (1974).
6. J. C. Pati and A. Salam, Phys. Rev. D 10, 275 (1974);
7. G. Senjanovic and A. Sokorac, Z. Phys. C 20, 255 (1983).ZPCFD2
8. P. H. Frampton and B.-H. Lee, Phys. Rev. Lett. 64, 619 (1990);
9. P. H. Frampton and T. W. Kephart, Phys. Rev. D 42, 3892 (1990);
10. P. H. Frampton, Mod. Phys. Lett. A 7, 559 (1992).
11. E. Witten, Nucl. Phys. B258, 75 (1985);
12. M. Dine, B259, 519 (1985);
13. J. Breit, B. A. Ovrut, and G. Segre, Phys. Lett. 158B, 33 (1985).
14. J. L. Hewett and T. G. Rizzo, Phys. Rep. 183, 193 (1989).
15. H1 Collaboration, C. Adloff, Z. Phys. C 74, 191 (1997); ZPCFD2
16. ZEUS Collaboration, J. Breitweg, 74, 207 (1997).
17. We thank J. Huston and F. Olness for discussions on this point.
18. See, however, the discussion by S. Kuhlmann, H. L. Lai, and W. K. Tung, hep-ph/9704338, where alternative parton density parametrizations are explored.
19. V. Barger, hep-ph/9703311;
20. A. E. Nelson, Phys. Rev. Lett. 78, 4159 (1997);
21. M. C. Gonzales-Garcia and S. F. Novaes, hep-ph/9703346;
22. N. Di Bartolomeo and M. Fabbrichesi, hep-ph/9703375;
23. N. G. Deshpande, B. Dutta, and X.-G. He, hep-ph/9705236.
24. E. J. Squires, Phys. Lett. 94B, 54 (1980);
25. H. Harari and N. Sieberg, 98B, 269 (1981);
26. H. Fritzsch and G. Mandelbaum, 102B, 319 (1981).
27. L. E. Ibanez and G. G. Ross, Nucl. Phys. B386, 3 (1992).
28. J. L. Hewett, “Single Squark Production at HERA via (Formula presented)-Parity Violating Interactions,” in Proceedings of the 1990 Summer Study on High Energy Physics—Research Directions for the Decade, Snowmass, CO, 1990, edited by E. L. Berger (World Scientific, Singapore, 1992).
29. J. Butterworth and H. Dreiner, Nucl. Phys. B397, 3 (1993);
30. in Second HERA Workshop on Physics, Hamburg, Germany, 1991, edited by W. Buchmüller and G. Ingelman (DESY, Hamburg, 1992);
31. T. Kon and T. Kobayashi, Phys. Lett. B 270, 81 (1991);
32. T. Kon, T. Kobayashi, S. Kitamura, K. Nakamura, and S. Adachi, Z. Phys. C 61, 239 (1994); ZPCFD2
33. T. Kon, T. Kobayashi, and S. Kitamura, Phys. Lett. B 333, 263 (1994);
34. T. Kon, T. Kobayashi, and S. Kitamura, Int. J. Mod. Phys. A 11, 1875 (1996).
35. The possibility that the HERA events can be understood within (Formula presented)-parity breaking or leptoquark models has been discussed by a number of authors. See, for example, H. Dreiner and P. Morawitz, hep-ph/9703279;
36. G. Altarelli, hep-ph/9703276;
37. D. Choudhury and S. Raychaudhuri, Phys. Lett. B 401, 54 (1997);
38. D. Choudhury and S. Raychaudhuri, Phys. Rev. D 56, 1778 (1997);
39. K. S. Babu, C. Kolda, J. March-Russell, and F. Wilczek, hep-ph/9703299;
40. J. Kalinowski, R. Rückl, H. Spiesberger, and P. M. Zerwas, hep-ph/9703276;
41. hep-ph/9703436;
42. T. Kon and T. Kobayashi, hep-ph/9704221.
43. W. Buchmüller, R. Rückl, and D. Wyler, Phys. Lett. B 191, 442 (1987);
44. see also J. Blümlein and R. Rückl, 304, 337 (1993).
45. Z. Kunszt and W. J. Stirling, hep-ph/9703427.
46. T. Plehn, H. Spiesberger, M. Spira, and P. M. Zerwas, Z. Phys. C 74, 611 (1997).ZPCFD2
47. S. Davidson, D. Bailey, and B. A. Campbell, Z. Phys. C 61, 613 (1994); ZPCFD2
48. see also G. K. Leontaris and J. D. Vergados, hep-ph/9703338.
49. M. Leurer, Phys. Rev. D 50, 536 (1994);
50. 49, 333 (1994).
51. C. S. Wood, Science 275, 1759 (1997).
52. For a review see, J. L. Rosner, hep-ph/9704331.
53. K. S. McFarland, Report No. FNAL-Pub-97/001-E, hep-ex/9701010.
54. C. Y. Prescott, Phys. Lett. 84B, 524 (1979).
55. A. Dobado, M. J. Herrero, and C. Munoz, Phys. Lett. B 191, 449 (1987);
56. V. D. Angelopoulos, Nucl. Phys. B292, 59 (1987);
57. R. N. Mohapatra, G. Segre, and L. Wolfenstein, Phys. Lett. 145B, 433 (1984);
58. J. Blümlein, Z. Phys. C 74, 605 (1997).ZPCFD2
59. J. A. Grifols and S. Peris, Phys. Lett. B 201, 287 (1988);
60. J. F. Gunion and E. Ma, 195, 257 (1987).
61. N. Harnew, in Proceedings of the 1987 HERA Workshop, Hamburg, Germany, 1987, edited by R. D. Peccei (DESY, Hamburg, 1988).
62. For an updated discussion on the effects of QCD and initial and final state radiation, see C. Freiberg, E. Norrbin, and T. Sjöstrand, hep-ph/9704214.
63. See, for example, A. D. Martin, R. G. Roberts, and W. J. Stirling, Phys. Lett. B 387, 419 (1996), and references therein.
64. J. L. Hewett and S. Pakvasa, Phys. Rev. D 37, 3165 (1988);
65. M. de Montigny, L. Marleau, and G. Simon, 52, 533 (1995).
66. A. Djouadi, J. Ng, and T. G. Rizzo, in Electroweak Symmetry Breaking and Beyond the Standard Model, edited by T. Barklow et al., (World Scientific, Singapore, 1997);
67. B. Dion, L. Marleau, and G. Simon, Phys. Rev. D 56, 479 (1997);
68. see also P. Arnold and C. Wendt, 33, 1873 (1986);
69. G. V. Borisov, Y. F. Pirogov, and K. R. Rudakov, Z. Phys. C 36, 217 (1987).ZPCFD2
70. M. de Montigny and L. Marleau, Phys. Rev. D 40, 2869 (1989);
71. 40, 3616 (1989). Although the earlier expressions used by these authors for the Born cross section are incorrect, the algebraic results that they obtain for the relevant (Formula presented) factors are correct.
72. H. L. Lai, Phys. Rev. D 51, 4763 (1995).
73. M. Krämer, T. Plehn, M. Spira, and P. Zerwas, Phys. Rev. Lett. 79, 341 (1997).
74. D0 Collaboration, J. Hobbs, presented at the 32nd Recontres de Moriond: Electroweak Interactions and Unified Theories, Le Arces, France, 15-22 March, 1997 (unpublished);CDF Collaboration, K. Maeshima, in 28th International Conference on High Energy Physics, Warsaw, Poland, 1996, Report No. FNAL-CONF-96/413-E (unpublished);CDF Collaboration, F. Abe et al., Fermilab Report No. FNAL-PUB-96-450-E (unpublished).
75. J. L. Hewett, T. G. Rizzo, S. Pakvasa, H. E. Haber, and A. Pomarol, in Proceedings of the Workshop on Physics at Current Accelerators and the Supercollider, 1993, edited by J. L. Hewett, A. White, and D. Zeppenfeld (ANL, Argonne, 1993), ANL-HEP-CP-93-92.
76. J. E. Cieza Montalvo and O. J. P. Eboli, Phys. Rev. D 50, 331 (1994).
77. The D0 Collaboration presently quotes a lower bound of 298(270) GeV on the mass of a vector leptoquark with a charged lepton branching fraction of 1(0.5), S. Hagopian (private communication).
78. T. G. Rizzo, Phys. Rev. D 33, 1851 (1986);
79. 34, 133 (1986).
80. U. Baur and K. H. Streng, Phys. Lett. 162B, 387 (1985);
81. R. S. Chivukula, M. Golden, and E. Simmons, Phys. Lett. B 257, 403 (1991).
82. O. J. P. Eboli and A. V. Olinto, Phys. Rev. D 38, 173 (1988);
83. A. Dobado, M. J. Herrero, and C. Munoz, Phys. Lett. B 207, 97 (1988);
84. V. Barger, 220, 464 (1989).
85. R. Rückl and P. Zerwas, in Proceedings of the LaThuile Workshop on Physics at Future Accelerators, LaThuile, Italy, 1987, edited by J. H. Mulvay, CERN Report No. 87-07, 1987.
86. CDF Collaboration, F. Abe, Phys. Rev. D 49, R1 (1994);
87. F. Abe, Phys. Rev. Lett. 77, 2616 (1996);
88. D0 Collaboration, S. Abachi, 75, 1456 (1995).
89. Future Electroweak Physics at the Fermilab Tevatron—Report of the Tev-2000 Study Group, edited by D. Amidei and R. Brock, Fermilab Report No. FNAL-Pub-96/082, 1996.
90. M. Peskin and T. Takeuchi, Phys. Rev. Lett. 65, 964 (1990);
91. M. Peskin and T. Takeuchi, Phys. Rev. D 46, 381 (1992);
92. W. Marciano and J. Rosner, Phys. Rev. Lett. 65, 2963 (1990);
93. G. Altarelli and R. Barbieri, Phys. Lett. B 253, 161 (1990);
94. D. Kennedy and P. Langacker, Phys. Rev. Lett. 65, 2967 (1990);
95. D. Kennedy and P. Langacker, Phys. Rev. D 44, 1591 (1991).
96. I. Maksymyk, C. P. Burgess, and D. London, Phys. Rev. D 50, 529 (1994);
97. C. P. Burgess, Phys. Lett. B 326, 276 (1994).
98. O. Eboli, hep-ph/9508342;
99. O. J. Eboli, M. C. Gonzalez-Garcia, and J. K. Mizukoshi, Phys. Lett. B 396, 238 (1997);
100. O. J. Eboli, M. C. Gonzalez-Garcia, and J. K. Mizukoshi, Nucl. Phys. B443, 20 (1995);
101. G. Bhattacharyya, J. Ellis, and K. Sridhar, Phys. Lett. B 336, 100 (1994);
102. 338, 522(E) (1994).
103. J. L. Hewett and T. G. Rizzo, Phys. Rev. D 36, 3367 (1987);
104. J. Blümlein and R. Rückl, Phys. Lett. B 304, 337 (1993).
105. J. Blümlein, E. Boos, and A. Kryukov, Phys. Lett. B 392, 150 (1997);
106. D. Choudhury, 346, 291 (1995);
107. J. E. Cieza-Montalvo and O. J. Eboli, Phys. Rev. D 47, 837 (1993);
108. T. G. Rizzo, 44, 186 (1991).
109. H. Dreiner, Mod. Phys. Lett. A 3, 443 (1988);
110. G. Bhattacharyya, D. Choudhury, and K. Sridhar, Phys. Lett. B 349, 118 (1995);
111. M. S. Berger, hep-ph/9609517.
112. See, however, LEP/SLD Electroweak Working Group, CERN Report No. CERN-PPE/96-183, 1996 (unpublished).
113. J. Blümlein and E. Boos, Physics at LEP 200 and Beyond, Proceedings of the Workshop, Teupitz, Germany, 1994, edited by T. Riemann and J. Blumlein [Nucl. Phys. B (Proc. Suppl.) 37B, 181 (1994)].NPBSE7
114. J. L. Hewett and S. Pakvasa, Phys. Lett. B 227, 178 (1989);
115. H. Nadeau and D. London, Phys. Rev. D 47, 3742 (1993);
116. O. J. Eboli, Phys. Lett. B 311, 147 (1993);
117. G. Belanger, D. London, and H. Nadeau, Phys. Rev. D 49, 3140 (1994);
118. F. Cuypers, Nucl. Phys. B474, 57 (1996);
119. T. G. Rizzo, Phys. Rev. D 44, 186 (1991);
120. M. A. Doncheski and S. Godfrey, 49, 6220 (1994)
121. 51, 1040 (1995);
122. Phys. Lett. B 393, 355 (1997).
123. F. Cuypers and S. Davidson, Report No. PSI-PRD-96-21, hep-ph/9609487.
124. We would like to thank M. Worah and M. Peskin for pointing out this important observation.
125. For a discussion of embedding leptoquarks in the Pati-Salam type unification scheme see S. F. King and G. K. Leontaris, hep-ph/9704336.
126. For a discussion of exotic leptoquarks from string theory see J. K. Elwood and A. E. Faraggi, hep-ph/9704363.
127. I. Antoniadis, J. Ellis, J. S. Hagelin, and D. V. Nanopolous, Phys. Lett. B 194, 321 (1987).
128. For an overview of the phenomenology of leptoquarkinos see Ref. 9.
129. See also B. Dutta, R. N. Mohapatra, and S. Nandi, hep-ph/9704428.
130. M. Peskin (private communication).
131. T. G. Rizzo, Phys. Rev. D 45, 3903 (1992).
132. H. Murayama and T. Yanagida, Mod. Phys. Lett. A 7, 147 (1992).
133. W. J. Marciano, talk given at the 1983 International Symposium on Lepton and Photon Interactions at High Energies, Ithaca, NY, 1983, edited by D. G. Cassel and D. L. Kreinick, QCD161:I71:1983.
134. Particle Data Group, R. M. Barnett, Phys. Rev. D 54, 1 (1996).
135. See, for example, K. Tamvakis, Phys. Lett. B 383, 307 (1996);
136. 382, 251 (1996), and references therein.
137. See, however, the discussions in G. F. Guidice and R. Rattazzi, hep-ph/9704339;
138. R. Barbieri, A. Strumia, and Z. Berezhiani, hep-ph/9704275.