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J. Kotcher

Brookhaven National Laboratory

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Featured researches published by J. Kotcher.

Physical Review Letters | 1997

MEASUREMENT OF THE TOP QUARK PAIR PRODUCTION CROSS SECTION IN PP COLLISIONS

S. Abachi; B. Abbott; M. Abolins; B. S. Acharya; I. Adam; D. L. Adams; M. Adams; S. Ahn; H. Aihara; G. A. Alves; E. Amidi; N. Amos; E. W. Anderson; R. Astur; M. M. Baarmand; A. Baden; V. Balamurali; J. Balderston; B. Baldin; S. Banerjee; J. Bantly; J. F. Bartlett; K. Bazizi; Alexander Belyaev; S. B. Beri; I. Bertram; V. A. Bezzubov; P. C. Bhat; V. Bhatnagar; M. Bhattacharjee

We present a measurement of the ttbar production cross section in ppbar collisions at root(s) = 1.8TeV by the D0 experiment at the Fermilab Tevatron. The measurement is based on data from an integrated luminosity of approximately 125 pb^-1 accumulated during the 1992-1996 collider run. We observe 39 ttbar candidate events in the dilepton and lepton+jets decay channels with an expected background of 13.7+-2.2 events. For a top quark mass of 173.3GeV/c^2, we measure the ttbar production cross section to be 5.5+-1.8 pb.

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2001

Cosmic-ray tests of the DØ preshower detector

P. Baringer; A. Bross; V Buescher; F. Canelli; G Davis; K. Del Signore; S Desai; J Estrada; G. Ginther; A. Gordeev; P.D. Grannis; S. Grünendahl; S Hou; J. Kotcher; D. Lincoln; M Liu; A.A Mayorov; H. A. Neal; T Nunnemann; A Patwa; J. Qian; M. Rijssenbeek; P. Rubinov; L. Sawyer; A Talalaevskii; A.S. Turcot; R. Van Kooten; Z.M Wang; J. Warchol; M. Wayne

Abstract The DO preshower detector consists of scintillator strips with embedded wavelength-shifting fibers, and a readout using Visible Light Photon Counters. The response to minimum ionizing particles has been tested with cosmic-ray muons. We report results on the gain calibration and light-yield distributions. The spatial resolution is investigated taking into account the light sharing between strips, the effects of multiple scattering and various systematic uncertainties. The detection efficiency and noise contamination are also investigated.

Archive | 2003

Technical design report of the forward preshower detector for the D0 upgrade

A. Gordeev; P. D. Grannis; J. Steffens; D. Chakraborty; M.Xiong Liu; P. Yamin; A. Patwa; M. Rijssenbeek; M. Chung; M. Bhattacharjee; D. Shpakov; J. Kotcher; A. Lucotte; A. Talalevskii

Archive | 2000

Extraction of the width of the W boson from measurements of sÑpp ¯\W¿XÖˆBÑW\enÖ and sÑpp ¯\Z¿XÖˆBÑZ\eeÖ and their ratio

B. Abbott; M. Abolins; V. Abramov; B. S. Acharya; I. Adam; D. L. Adams; M. Adams; S. Ahn; V. Akimov; G. A. Alves; N. Amos; E. W. Anderson; M. M. Baarmand; V. V. Babintsev; L. Babukhadia; A. Baden; B. Baldin; S. Banerjee; J. Bantly; E. Barberis; P. Baringer; J. F. Bartlett; A. Belyaev; S. B. Beri; I. Bertram; V. A. Bezzubov; P. C. Bhat; V. Bhatnagar; M. Bhattacharjee; G. Blazey

Physical Review Letters | 1998

Search for First Generation Scalar Leptoquark Pairs in {ital p}{bar {ital p}} Collisions at {radical}({ital s}) = 1.8 TeV

B. Gómez; B. Hoeneisen; P. Mooney; J. P. Negret; K. Davis; D. Fein; G. E. Forden; J. A. Guida; E. James; K. Johns; F. Nang; A. Narayanan; J. P. Rutherfoord; J. M. Butler; B. Gibbard; H. A. Gordon; N. Graf; S. Kahn; J. Kotcher; S. Protopopescu; S. Rajagopalan; J. Bantly; D. Cullen-Vidal; D. Cutts; Jan M. Guida; J. S. Hoftun; R. Partridge; S. Grinstein; R. Piegaia; P. Bloom

Physical Review Letters | 1998

Measurement of the Shape of the Transverse Momentum Distribution of {ital W} Bosons Produced in {ital p}{bar {ital p}} Collisions at {radical}({ital s}) =1.8 TeV

B. Gómez; B. Hoeneisen; P. Mooney; J. P. Negret; L. Babukhadia; K. Davis; D. Fein; G. E. Forden; J. A. Guida; E. James; K. Johns; F. Nang; A. Narayanan; J. P. Rutherfoord; M. A. Shupe; J. M. Butler; Y. Fisyak; B. Gibbard; H. A. Gordon; N. Graf; S. Kahn; J. Kotcher; S. Protopopescu; S. Rajagopalan; J. Bantly; D. Cullen-Vidal; D. Cutts; Jan M. Guida; J. S. Hoftun; R. Partridge

Physical Review Letters | 1998

Search for Charge-1/3 Third-Generation Leptoquarks in {ital p}{bar {ital p}} Collisions at {radical} (s) =1.8 TeV

B. Gómez; B. Hoeneisen; P. Mooney; J. P. Negret; L. Babukhadia; K. Davis; D. Fein; G. E. Forden; J. A. Guida; E. James; K. Johns; F. Nang; A. Narayanan; J. P. Rutherfoord; M. A. Shupe; J. M. Butler; Y. Fisyak; B. Gibbard; H. A. Gordon; N. Graf; S. Kahn; J. Kotcher; S. Proptopopescu; S. Rajagopalan; J. Bantly; D. Cullen-Vidal; D. Cutts; Jan M. Guida; J. S. Hoftun; R. Partridge

Physical Review D | 1998

Z{gamma} production in p{bar p} collisions at {radical} (s) =1.8TeV and limits on anomalous ZZ{gamma} and Z{gamma}{gamma} couplings

B. Gómez; B. Hoeneisen; P. Mooney; J. P. Negret; K. Davis; D. Fein; G. E. Forden; J. A. Guida; E. James; K. Johns; F. Nang; A. Narayanan; J. P. Rutherfoord; J. M. Butler; M. K. Fatyga; B. Gibbard; H. A. Gordon; N. Graf; S. Kahn; J. Kotcher; S. Protopopescu; S. Rajagopalan; J. Bantly; D. Cullen-Vidal; D. Cutts; Jan M. Guida; J. S. Hoftun; R. Partridge; S. Grinstein; R. Piegaia

Physical Review D | 1998

Limits on anomalous WW{gamma} and WWZ couplings

Physical Review D | 1998

ZÎ³ production in p{bar p} collisions at â (s) =1.8TeV and limits on anomalous ZZÎ³ and ZÎ³Î³ couplings

Bernardo J. A Gomez; B. Hoeneisen; P. Mooney; J. P. Negret; K. Davis; D. Fein; G. E. Forden; J. A. Guida; Eric B. James; Kenneth Johns; F. Nang; A. Narayanan; John Rutherfoord; John Butler; M. K. Fatyga; B. Gibbard; Howard Gordon; N. Graf; S. Kahn; J. Kotcher; S. Protopopescu; S. Rajagopalan; J. Bantly; D. Cullen-Vidal; David Cutts; Jan M. Guida; J. S. Hoftun; R. Bruce Partridge; Sebastian Grinstein; R. Piegaia

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