Search for New Quarks Suggested by the Superstring

Angelopoulos, V.D.; Ellis, John R.; Kowalski, H.; Nanopoulos, Dimitri V.; Tracas, N.D.; Zwirner, F.

doi:10.1016/0550-3213(87)90637-7

Search for New Quarks Suggested by the Superstring

V.D. Angelopoulos
(
- CERN and
- Oxford U.
)
,
John R. Ellis
(
- CERN
)
,
H. Kowalski
(
- CERN
)
,
Dimitri V. Nanopoulos
(
- CERN
)
,
N.D. Tracas
(
- CERN
)

Oct, 1986

34 pages

Published in:

Nucl.Phys.B 292 (1987) 59-92

Published: 1987

DOI:

10.1016/0550-3213(87)90637-7

Report number:

CERN-TH-4578/86,
MAD/TH/86-26

View in:

CERN Document Server

reference search152 citations

Citations per year

Abstract: (Elsevier)

We discuss the possible phenomenology of the additional charge ( − 1 3 ) colour triplet particles D 1 2 of spin 1 2 and D 0 , D 0 c of spin 0 which are contained in each matter generation if the superstring is compactified on a Calabi-Yau manifold. In the minimal model with no intermediate mass scales and supersymmetry breaking fed into the observable sector via a gaugino mass, either a spin - 1 2 or a spin-0 D particle could be the lightest, and either could be as light as the present lower bound from e + e − experiments of about 20 GeV. The D particles could behave as leptoquarks coupling to quarks and leptons, in which case the single production process ep → D 0 ( D 0 c ) + X would occur, and D 0 ( D 0 c ) → l q, D 1 2 → l q χ decays would dominate, where χ is the lightest supersymmetric particle. Alternatively, the D particles could behave as disquarks coupling ( p ) p → D 0 ( D 0 ( D c , D 0 D 0 c ) + K to pairs of antiquarks, in which case the single production process would occur, and D 0 ( D 0 c ) → qq , D 0 c ( D 0 ) → qq , D 1 2 → qq χ decays would dominate. We present cross sections for ep → D 0 (D 0 c + X, ep → D 0 ( D 0 c ) + X , ( p ) p → D 0 ( D 0 c , D 0 c , D 0 c , D 0 ) + X , e + e − → D 0 D 0 ( D 0 c D 0 c ) and D 1 2 D 1 2 , ( p ) p → D 0 D 0 ( D 0 c D 0 c and D 1 2 D 1 2 + X . We calculate the experimental signals and estimate backgrounds for D production and decay in these processes. The decays D 0 ( D 0 c ) → l q and D 1 2 → l q χ or qq χ would be detectable in most of these reactions, but D 0 ( D 0 c → qq decays may only be detectable in e + e − → D 0 D 0 ( D 0 c D 0 c ) collisions.

MODEL: STRING
SUPERSYMMETRY
GRAND UNIFIED THEORY: E(6)
GROUP THEORY: REPRESENTATION
COLORED PARTICLE: SCALAR PARTICLE
COLORED PARTICLE: FERMION
POSTULATED PARTICLE: PRODUCTION
PRODUCTION: POSTULATED PARTICLE
CROSS SECTION: MASS
MASS: CROSS SECTION

References(33)

Figures(0)

Vacuum configurations for superstrings

P. Candelas
(
- Texas U. and
- Santa Barbara, KITP
)
,
Gary T. Horowitz
(
- UC, Santa Barbara
)
,
Andrew Strominger
(
- Princeton, Inst. Advanced Study
)
,
Edward Witten
(
- Princeton U.
)

- Nucl.Phys.B 258 (1985) 46-74,
- Nucl.Phys.B 258 (1985) 46-74,
- Also in *Schwarz, J.H. (ed.): Superstrings, Vol. 2*, 1107-1137, and in *Ferrara, S. (ed.): Supersymmetry, Vol. 2*, 1310-1338, and in *Dine, M. (ed.): String theory in four dimensions* 49-77
•
DOI:
- 10.1016/0550-3213(85)90602-9

Symmetry breaking patterns in superstring models

Edward Witten
(
- Princeton U.
)

- Nucl.Phys.B 258 (1985) 75-100,
- Nucl.Phys.B 258 (1985) 75,
- IN *DINE, M. (ED.): STRING THEORY IN FOUR DIMENSIONS* 78-103. (NUCL. PHYS. B258 (1985) 75-100) AND PREPRINT - WITTEN, E (85,REC.APR.) 45 P. (SEE BOOK INDEX)
•
DOI:
- 10.1016/0550-3213(85)90603-0

Superstring Model Building

Michael Dine
(
- Princeton, Inst. Advanced Study
)
,
V. Kaplunovsky
(
- Princeton U.
)
,
Michelangelo L. Mangano
(
- Princeton U.
)
,
C. Nappi
(
- Princeton U.
)
,
N. Seiberg
(
- Princeton, Inst. Advanced Study
)

- Nucl.Phys.B 259 (1985) 549-571,
- IN *DINE, M. (ED.): STRING THEORY IN FOUR DIMENSIONS* 172-194
•
DOI:
- 10.1016/0550-3213(85)90001-X

- Phys.Rev.Lett.B 158 33

- Phys.Rev.Lett.B 156 318

Strings on Orbifolds

- Nucl.Phys.B 261 (1985) 678-686,
•
DOI:
- 10.1016/0550-3213(85)90593-0

Strings on Orbifolds. 2.

- Nucl.Phys.B 274 (1986) 285-314,
- In *Schellekens, A.N. (ed.): Superstring construction* 181-210. (Nucl. Phys. B274 (1986) 285-314) and Preprint - Dixon, L.J. (86,rec.Mar.) 55 p. (see Book Index)
•
DOI:
- 10.1016/0550-3213(86)90287-7

- Phys.Rev.Lett.B 181 283

- Phys.Rev.Lett.B 165 76

Observables in Low-Energy Superstring Models

- Mod.Phys.Lett.A 1 (1986) 57
•
DOI:
- 10.1142/S0217732386000105

Aspects of the Superunification of Strong, Electroweak and Gravitational Interactions

- Nucl.Phys.B 276 (1986) 14-70
•
DOI:
- 10.1016/0550-3213(86)90015-5

Phenomenological Mass Limits on Extra Z of E6 Superstrings

Vernon D. Barger
(
- Wisconsin U., Madison
)
,
N.G. Deshpande
(
- Oregon U.
)
,
K. Whisnant
(
- Florida State U.
)

- Phys.Rev.Lett. 56 (1986) 30
•
DOI:
- 10.1103/PhysRevLett.56.30

- Phys.Rev.Lett.B 166 436

Extra Gauge Bosons in E(6)

David London
(
- British Columbia U.
)
,
Jonathan L. Rosner
(
- Chicago U., EFI and
- Chicago U.
)

- Phys.Rev.D 34 (1986) 1530
•
DOI:
- 10.1103/PhysRevD.34.1530

- Nucl.Phys.B 283 83

Production of $E(6)$ Heavy Leptons at Super Collider Energies

- Phys.Rev.D 34 (1986) 2902
•
DOI:
- 10.1103/PhysRevD.34.2902

E $_{6}$ and Exotic Fermions

Jonathan L. Rosner
(
- Chicago U., EFI and
- Chicago U.
)

- Comments Nucl.Part.Phys. 15 (1986) 5, 195-221

On the Mixing and Production of Exotic Fermions in E6

R.W. Robinett
(
- Massachusetts U., Amherst
)

- Phys.Rev.D 33 (1986) 1908
•
DOI:
- 10.1103/PhysRevD.33.1908

Extra Fermions in E6 Superstring Theories

Vernon D. Barger
(
- Wisconsin U., Madison
)
,
N. Deshpande
(
- Oregon U.
)
,
R.J.N. Phillips
(
- Rutherford
)
,
K. Whisnant
(
- Florida State U.
)

- Phys.Rev.D 33 (1986) 1912,
- Phys.Rev.D 35 (1987) 1741 (erratum),
- Wisconsin Univ. Madison - MAD-PH-272 (85,REC.DEC.) 47p,
- Phys. Rev. D33 ( 1986) 1912-1924 and Wisconsin Univ. Madison - MAD-PH-272 (85,REC.DEC.) 47p
•
DOI:
- 10.1103/PhysRevD.33.1912

- Phys.Rev.Lett.B 129 193

- Phys.Rev.Lett.B 141 229

- Phys.Rev.Lett.B 139 115

- Phys.Rev.Lett.B 147 493

- Phys.Rev.Lett.B 180 77

- Phys.Rev.Lett.B 82 95

1-25 of 33
1
2
25 / page