Measurement of the top quark pair production cross section in p[bar p] collisions using multijet final states

Journal Article · Thu Jul 01 04:00:00 EDT 1999 · Physical Review, D

OSTI ID:6272127

Grinstein, S; Mostafa, M; Piegaia, R ^[1]; Alves, G A; Carvalho, W; Maciel, A K; da Motta, H; Oliveira, E; Santoro, A ^[2]; Lima, J G; Oguri, V ^[3]; Gomez, B; Hoeneisen, B; Mooney, P; Negret, J P ^[4]; Ducros, Y ^[5]; Beri, S B; Bhatnagar, V; Kohli, J M; Singh, J B ^[6] ; Shivpuri, R K ^[7]; Acharya, B S; Banerjee, S; Dugad, S R; Gupta, A; Krishnaswamy, M R; Mondal, N K; Narasimham, V S; Parua, N; Shankar, H C ^[8]; Park, Y M ^[9]; Choi, S; Kim, S K ^[10]; Castilla-Valdez, H; Gonz,

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1. Universidad de Buenos Aires, Buenos Aires (Argentina)
2. LAFEX, Centro Brasileiro de Pesquisas Fi sicas, Rio de Janeiro (Brazil)
3. Universidade do Estado do Rio de Janeiro, Rio de Janeiro (Brazil)
4. Universidad de los Andes, Bogota (Colombia)
5. DAPNIA/Service de Physique des Particules, CEA, Saclay (France)
6. Panjab University, Chandigarh (India)
7. Delhi University, Delhi (India)
8. Tata Institute of Fundamental Research, Mumbai (India)
9. Kyungsung University, Pusan (Korea)
10. Seoul National University, Seoul (Korea)

We have studied t[bar t] production using multijet final states in p[bar p] collisions at a center-of-mass energy of 1.8 TeV, with an integrated luminosity of 110.3 pb[sup [minus]1]. Each of the top quarks with these final states decays exclusively to a bottom quark and a [ital W] boson, with the [ital W] bosons decaying into quark-antiquark pairs. The analysis has been optimized using neural networks to achieve the smallest expected fractional uncertainty on the t[bar t] production cross section, and yields a cross section of 7.1[plus minus]2.8 (stat)[plus minus]1.5 (syst) pb, assuming a top quark mass of 172.1 GeV/c[sup 2]. Combining this result with previous DO/ measurements, where one or both of the [ital W] bosons decay leptonically, gives a t[bar t] production cross section of 5.9[plus minus]1.2 (stat)[plus minus]1.1 (syst)thinsppb. [copyright] [ital 1999] [ital The American Physical Society]

• OSTI ID: 6272127
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Vol. 60:1; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662340* -- Hadron Interactions-- (1992-)
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
BARYON-BARYON INTERACTIONS
BEAUTY PARTICLES
BOSONS
CROSS SECTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
NEURAL NETWORKS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
POSTULATED PARTICLES
PROTON-ANTIPROTON INTERACTIONS
QUARKS
T QUARKS
TOP PARTICLES
W PLUS BOSONS