Search for top squarks at the Fermilab Tevatron collider

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.4517· OSTI ID:6953929

Baer, H ^[1]; Sender, J; Tata, X ^[2]

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1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
2. Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822 (United States)

The lighter superpartner of the top quark ([ital [tilde t]][sub 1]) may be considerably lighter than squarks of the first two generations, and hence may be accessible to Fermilab Tevatron collider searches, even if the other squarks and the gluino are too heavy. For the range of [ital m][sub [ital [tilde t]]1] of interest at the Tevatron, the [ital [tilde t]][sub 1] decays to a chargino via [ital [tilde t]][sub 1][r arrow][ital b[tilde W]][sub 1] if this is kinematically allowed; otherwise, the flavor-changing loop decay [ital [tilde t]][sub 1][r arrow][ital c[tilde Z]][sub 1] dominates. In the latter case, [ital [tilde t]][sub 1] production is signaled by jet(s) plus [ital ];sE[sub [ital T]] events. If, instead, the chargino decay is allowed, 1[ital l]+[ital b] jets+[ital ];sE[sub [ital T]] and [ital l][sup +][ital l][prime][sup [minus]]+jet(s)+[ital ];sE[sub [ital T]] events from leptonic decays of [ital [tilde W]][sub 1] provide the most promising signals. We perform detailed simulations for each of these signals using ISAGET 7.07 and devise cuts to enable the extraction of each of these signals above standard model backgrounds from vector boson or top quark production. With an integrated luminosity of 100 pb[sup [minus]1], experiments should be able to probe top squark masses up to [similar to]100 GeV in each of these channels; the detection of the signal in the single lepton channel, however, requires reasonable capability to tag displaced [ital b] decay vertices in the central region.

• DOE Contract Number: FG05-87ER40319; AM03-76SF00235
• OSTI ID: 6953929
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 50:7; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Pa
FERMILAB TEVATRON
TOP PARTICLES
PARTICLE IDENTIFICATION
SPARTICLES
QUARKS
SIGNALS
SIMULATION
ACCELERATORS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
FERMIONS
POSTULATED PARTICLES
SYNCHROTRONS
662440* - Properties of Other Particles Including Hypothetical Particles- (1992-)
662210 - Specific Theories & Interaction Models
Particle Systematics- Unified Theories & Models- (1992-)
662340 - Hadron Interactions- (1992-)