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Search for single-top production in ep collisions at HERA
- Source :
- Physics Letters B, 559 (3-4), Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. B559, p. 153-170 (2003), Physics Letters B, 559, 153-170. Elsevier, Physics Letters B, 708(1-2), 27. Elsevier, Physics Letters B, 708(1-2), 27-36. Elsevier, Physics Letters B, 708(1-2), 27-36. ELSEVIER SCIENCE BV
- Publication Year :
- 2003
- Publisher :
- ELSEVIER SCIENCE BV, 2003.
-
Abstract
- A search for single-top production, ep --> etX, has been made with the ZEUS detector at HERA using an integrated luminosity of 130.1 pb-1. Events from both the leptonic and hadronic decay channels of the W boson resulting from the decay of the top quark were sought. For the leptonic mode, the search was made for events with isolated high-energy leptons and significant missing transverse momentum. For the hadronic decay mode, three-jet events in which two of the jets had an invariant mass consistent with that of the W were selected. No evidence for top production was found. The results are used to constrain single-top production via flavour-changing neutral current (FCNC) transitions. The ZEUS limit excludes a substantial region in the FCNC t-u-gamma coupling not ruled out by other experiments.<br />28 pages, 4 figures, 2 tables, final version (minor changes in text) Addendum with new limits included
- Subjects :
- Particle physics
Nuclear and High Energy Physics
MONTE-CARLO GENERATOR
LUND MONTE-CARLO
P(P)OVER-BAR COLLISIONS
FOS: Physical sciences
FCNC
CHANGING NEUTRAL CURRENTS
DEEP-INELASTIC-SCATTERING
MISSING TRANSVERSE-MOMENTUM
CENTRAL TRACKING DETECTOR
ZEUS BARREL CALORIMETER
COLOR DIPOLE MODEL
HIGH-ENERGY LEPTON
PARTON DISTRIBUTIONS
QUARK PRODUCTION
CROSS-SECTIONS
7. Clean energy
01 natural sciences
JET FRAGMENTATION
Standard Model
Vector boson
High Energy Physics - Experiment
Nuclear physics
E(+)E(-) COLLISIONS
High Energy Physics - Experiment (hep-ex)
0103 physical sciences
010306 general physics
QC
Boson
Physics
Research Groups and Centres\Physics\Low Temperature Physics
Luminosity (scattering theory)
ZEUS (particle detector)
Neutral current
010308 nuclear & particles physics
Faculty of Science\Physics
Electroweak interaction
High Energy Physics::Phenomenology
ZEUS
Single-top production
HERA
High Energy Physics::Experiment
HADRON-COLLISIONS
ZEUS experiment
Subjects
Details
- Language :
- English
- ISSN :
- 03702693
- Database :
- OpenAIRE
- Journal :
- Physics Letters B, 559 (3-4), Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. B559, p. 153-170 (2003), Physics Letters B, 559, 153-170. Elsevier, Physics Letters B, 708(1-2), 27. Elsevier, Physics Letters B, 708(1-2), 27-36. Elsevier, Physics Letters B, 708(1-2), 27-36. ELSEVIER SCIENCE BV
- Accession number :
- edsair.doi.dedup.....9eea23f45026770dab0db03a389ca335