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Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1984

The Mark III spectrometer

D. Bernstein; J. Bernstein; K. O. Bunnell; G. Burgueno; R. E. Cassell; B. Collins; D.H. Coward; K. F. Einsweiler; R.L. Eisele; B. Haber; D. Hutchinson; G. Mazaheri; E. McNerney; L. Moss; R. F. Mozley; A. Odian; J. Roehrig; K. Skarpaas; B. Sukiennicki; W. Toki; Y. Unno; F. Villa; W. Wadley; N. Wermes; D. Wisinski; R. M. Baltrusaitis; G. Belyansky; D. Coffman; R. Cooper; W. Freidler

Abstract This paper describes the design, construction and performance of the Mark III, a new general purpose large solid angle spectrometer at SPEAR, the SLAC 2–8 GeV e+e− storage ring. The detector has been designed for the study of exclusive final states in e+e− annihilation, which requires large solid angle coverage combined with charged particle momentum resolution, particle identification, and photon detection efficiency at low energies.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1984

The central drift chamber for the MARK III detector at SPEAR

J. Roehrig; K. F. Einsweiler; D. Hutchinson; E. McNerney; A. Odian; K. Skarpaas; Y. Unno; F. Villa; F. Grancagnolo; W. Rowe; A. Seiden; R. M. Baltrusaitis; J. Hauser; J. D. Richman; J. J. Russell; G. T. Blaylock; J. J. Thaler; W. J. Wisniewski

Abstract A large cylindrical drift chamber has been constructed for the MARK III detector at SPEAR. The inner layer has a high density of sense wires for the measurement of kinks, vees, and d E d x . The outer layers have a cell design with three sense wires, giving uniform drift behavior and left/right ambiguity resolution within a cell. The chamber has both current division and stereo layers for longitudinal position measurement.


Nuclear Physics B - Proceedings Supplements | 1990

Recent Ψ′ results from Mark III☆

Ronen Mir; D. Coffman; G. P. Dubois; F. DeJongh; G. Eigen; J. Hauser; D. G. Hitlin; A. I. Mincer; C. G. Matthews; J. D. Richman; William J. Wisniewski; Y. Zhu; Joan Adler; J. C. Brient; T. E. Browder; K. O. Bunnell; R. E. Cassell; D.H. Coward; K. Einsweiler; C. Grab; P. Kim; J. Labs; A. Odian; D. Pitman; R. H. Schindler; W. H. Toki; F. Villa; S. Wasserbaech; D. Wisinski; Z. Bai

This paper presents recent results from the Mark III detector at SPEAR, in the open charm sector. The first topic discussed is the reanalysis of the direct measurement of the D hadronic branching fractions, where a detailed study has been made of the Cabibbo suppressed and multi-..pi../sup 0/s D decays backgrounds in the double tag sample. Next, the Dalitz plot analysis of the D decays to K..pi pi.. is presented, leading to the relative fractions of three-body versus pseudoscalarvector decays. 7 refs., 5 figs.


Physical Review D | 1989

Search for the decay D0K0e+e-

J. Adler; J. J. Becker; G. T. Blaylock; T. Bolton; J. C. Brient; J. S. Brown; K. O. Bunnell; Mark J. Burchell; T. H. Burnett; R. E. Cassell; D. Coffman; V. Cook; D. H. Coward; F. DeJongh; D. E. Dorfan; J. Drinkard; G. P. Dubois; G. Eigen; K. F. Einsweiler; B. I. Eisenstein; T. Freese; C. Gatto; G. E. Gladding; C. Grab; R. P. Hamilton; J. Hauser; Clemens A. Heusch; David Hitlin; Jm Izen; P. C. Kim

A search for the decay of the charmed meson /ital D//sup 0//r arrow//bar K//sup 0/e/sup +/e/sup /minus// is presented, based on data collected at the /psi/(3770) resonance with the Mark III detector at the SLAC storage ring SPEAR. No evidence for this process is found, resulting in an upper limit on the decay branching ratio of 1.7/times/10/sup /minus/3/ at the 90% confidence level.


Physical Review D | 1988

Measurements of J/psi decays into a vector and a pseudoscalar meson

D. Coffman; G. P. Dubois; G. Eigen; J. Hauser; D. G. Hitlin; C. G. Matthews; J. D. Richman; William J. Wisniewski; Y. Zhu; Mark J. Burchell; D. E. Dorfan; J. Drinkard; C. Gatto; R. P. Hamilton; C. A. Heusch; L. Köpke; W. S. Lockman; R. Partridge; J. Perrier; H. Sadrozinski; M. Scarlatella; T. Schalk; A. Seiden; A. J. Weinstein; R. Xu; J. J. Becker; G. T. Blaylock; B. I. Eisenstein; T. Freese; G. E. Gladding


Physical Review D | 1985

J/ psi decays into a vector and a pseudoscalar meson and the quark content of the eta and eta '

R. M. Baltrusaitis; D. Coffman; J. Hauser; D. G. Hitlin; J. D. Richman; J. J. Russell; R. H. Schindler; D. E. Dorfan; R. Fabrizio; F. Grancagnolo; R. P. Hamilton; C. A. Heusch; L. Köpke; R. Partridge; J. Perrier; H. Sadrozinski; M. Scarlatella; T. Schalk; A. Seiden; J. J. Becker; G. T. Blaylock; J. S. Brown; H. Cui; B. I. Eisenstein; G. E. Gladding; S. A. Plaetzer; A. L. Spadafora; J. J. Thaler; A. Wattenberg; W. J. Wisniewski


Physical Review D | 1986

Hadronic decay of the eta/sub c/(2980)

R. M. Baltrusaitis; D. M. Coffman; J. Hauser; D. G. Hitlin; J. D. Richman; J. J. Russell; R. H. Schindler


Physical Review D | 1985

Decays of the J/psi into two pseudoscalar mesons

R. M. Baltrusaitis; D. Coffman; J. Hauser; D. G. Hitlin; J. D. Richman; J. J. Russell; R. H. Schindler; D. E. Dorfan; R. Fabrizio; F. Grancagnolo; R. P. Hamilton; C. A. Heusch; L. Köpke; R. Partridge; J. Perrier; H. Sadrozinski; M. Scarlatella; T. Schalk; A. Seiden; A. J. Weinstein; J. J. Becker; G. T. Blaylock; J. S. Brown; H. Cui; B. I. Eisenstein; G. E. Gladding; S. A. Plaetzer; A. L. Spadafora; J. J. Thaler; A. Wattenberg


Physical Review D | 1990

Study of the doubly radiative decay J0

D. Coffman; F. DeJongh; G. P. Dubois; G. Eigen; J. Hauser; David Hitlin; C. G. Matthews; A. I. Mincer; J. D. Richman; William J. Wisniewski; Y. Zhu; Mark J. Burchell; D. E. Dorfan; J. Drinkard; C. Gatto; R. P. Hamilton; Clemens A. Heusch; L. Köpke; William Lockman; R. Partridge; H. F.-W. Sadrozinski; M. Scarlatella; T. Schalk; Abraham Seiden; A. J. Weinstein; S. Weseler; R. Xu; J. J. Becker; G. T. Blaylock; B. I. Eisenstein


Physical Review D | 1987

Radiative decays of the J/ into +- and K+K-

R. M. Baltrusaitis; D. Coffman; G. P. Dubois; G. Eigen; J. Hauser; D. G. Hitlin; C. G. Matthews; J. D. Richman; J. J. Russell; Y. Zhu; T. Bolton; K. O. Bunnell; R. E. Cassell; D.H. Coward; S. Dado; D. Favart; K. F. Einsweiler; U. Mallik; R. F. Mozley; A. Odian; J. Roehrig; R. H. Schindler; W. Stockhausen; W. Toki; F. Villa; S. Wasserbaech; N. Wermes; D. Wisinski; Guenter Wolf; D. E. Dorfan

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J. D. Richman

California Institute of Technology

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D. Coffman

California Institute of Technology

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D. E. Dorfan

University of California

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D. G. Hitlin

California Institute of Technology

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R. M. Baltrusaitis

California Institute of Technology

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G. P. Dubois

California Institute of Technology

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J. J. Russell

California Institute of Technology

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R. P. Hamilton

University of California

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G. Eigen

University of Bergen

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C. G. Matthews

California Institute of Technology

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