Published June 25, 1987
| Version v1
Journal article
Limits on new quarks and majorons from Γz/Γw
- 1. Wisconsin Univ., Madison (USA). Dept. of Physics
- 2. Oregon Univ., Eugene (USA). Inst. of Theoretical Science
- 3. Science and Engineering Research Council, Chilton (UK). Rutherford Appleton Lab.
Description
Recent evaluations of the ratio ΓZ/ΓW in panti p collider experiments place new limits on the possible masses of new quarks and the existence of majorons. If only neutrinos can contribute beyond the third generation, then mt > 62 GeV implies Nv ≤ 4 neutrino species. If majorons exist and there are no charged scalars below MW, then Nv = 3 and mt < 62 GeV. Contributions from fourth-generation charge -1/3 quarks v and charged leptons L alter the ratio ΓZ/ΓW in opposite directions; a range of situations are possible in which either v or L or both are present with masses down to 24 GeV. (orig.)
Additional details
Publishing Information
- Journal Title
- Phys. Lett., B
- Journal Volume
- 192
- Journal Issue
- 1/2
- Series
- Phys. Lett., B.
- Journal Page Range
- 212-216
- ISSN
- 0370-2693
- CODEN
- PYLBA
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 18092345
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- INTERMEDIATE VECTOR BOSONS; LIMITING VALUES; MAJORANA THEORY; NEUTRINOS; PARTICLE WIDTHS; QUARKS; REST MASS; W MINUS BOSONS; W PLUS BOSONS; WEAK PARTICLE DECAY; Z NEUTRAL BOSONS
- Descriptors DEC
- BOSONS; DECAY; ELEMENTARY PARTICLES; FERMIONS; INTERMEDIATE BOSONS; LEPTONS; MASS; MASSLESS PARTICLES; PARTICLE DECAY; PARTICLE PROPERTIES; POSTULATED PARTICLES
Optional Information
- Contract/Grant/Project number
- Contract DE-AC02-76ER00881; DE-FG06-85ER40224