B. Brabson
Indiana University Bloomington
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by B. Brabson.
Physics Letters B | 1986
M. Derrick; K. K. Gan; P. Kooijman; J. S. Loos; B. Musgrave; L. E. Price; James Schlereth; K. Sugano; J.M. Weiss; D.E. Wood; D. Blockus; B. Brabson; S.W. Gray; C. Jung; H. A. Neal; H. Ogren; D. R. Rust; M. Valdata-Nappi; C. Akerlof; G. Bonvicini; J. Chapman; D. Errede; N. Harnew; P. Kesten; D.I. Meyer; D. Nitz; A.A. Seidl; R. P. Thun; T. Trinko; M. Willutzky
Abstract The charged particle multiplicity distribution for e+e− annihilations at s = 29 GeV has been measured using the High Resolution Spectrometer at PEP. The multiplicity distribution, expressed as a function of the mean, shows KNO scaling when compared to e+e− data at other energies. Multiplicity distributions for particles selected in different central rapidity spans are presented. All of these are well presented by the Negative binomial distribution. As the rapidity span is narrowed, the distributions become broader and approach a constant value of the parameter k.
Physical Review Letters | 1990
S. Komamiya; Le Diberder F; G. S. Abrams; C.E. Adolphsen; D. Averill; J. Ballam; B. Barish; T. Barklow; B. A. Barnett; J. Bartelt; S. Bethke; D. Blockus; G. Bonvicini; A. M. Boyarski; B. Brabson; A. Breakstone; F. Bulos; P. R. Burchat; D. L. Burke; R. J. Cence; J. Chapman; M. Chmeissani; D. Cords; D. P. Coupal; P. D. Dauncey; H. DeStaebler; D. E. Dorfan; J. Dorfan; D.C. Drewer; R. Elia
We measured the differential jet-multiplicity distribution in {ital e}{sup +}{ital e}{sup {minus}} annihilation with the Mark II detector. This distribution is compared with the second-order QCD prediction and {alpha}{sub {ital s}} is determined to be 0.123{plus minus}0.009{plus minus}0.005 at {radical}{ital s}{approx}{ital M}{sub {ital Z}} (at the SLAC Linear Collider) and 0.149{plus minus}0.002{plus minus}0.007 at {radical}{ital s}=29 GeV (at the SLAC storage ring PEP). The running of {alpha}{sub {ital s}} between these two center-of-mass energies is consistent with the QCD prediction.
Physics Letters B | 1982
Y. Lemoigne; R. Barate; P. Bareyre; P. Bonamy; P. Borgeaud; M. David; F. X. Gentit; G. Laurens; B. Pietrzyk; G. Villet; S. Zaninotti; P. Astbury; A. Duane; G.J. King; B.C. Nandi; R. Namjoshi; D. Websdale; J. Wiejak; J.G. McEwen; B. Brabson; R.R. Crittenden; R. Heinz; J. Krider; T. Marshall
Abstract The χ1++(3507) and the χ2++(3553) states have been observed in the Goliath spectrometer at the CERN SPS in 185 GeV/c π−-Be collisions. Their radiative decays contribute 27.7% (for the χ1++) and 12.8% (for the χ2++) to J ϕ production. At this energy, their cross sections are 65±19 nb and 96±29 nb, respectively
Physics Letters B | 1988
P. Baringer; B.G. Bylsma; R. De Bonte; D. Koltick; E. H. Low; R. L. McIlwain; D. H. Miller; C. R. Ng; E. I. Shibata; S. Abachi; M. Derrick; P. Kooijman; B. Musgrave; L. E. Price; J. Repond; K. Sugano; D. Blockus; B. Brabson; J. M. Brom; C. Jung; H. Ogren; D. R. Rust; A. Snyder; C. Akerlof; J. Chapman; D. Errede; M. T. Ken; D. I. Meyer; H. A. Neal; D. Nitz
Abstract The production of D * and D mesons has been studied in e + e − annihilations at √s = 29GeV. The data, corresponding to an integrated luminosity of 300 pb −1 , were obtained using the HRS detector at PEP. The cross section is measured to be R (D 0 + D + ) = 2.40±0.35 and we determine the electroweak asymmetry to be −9.9 ± 2.7%, which corresponds to an axial vector coupling constant product g e g c = 0.26 ± 0.07.
Physics Letters B | 1985
M. Derrick; K. K. Gan; P. Kooijman; J. S. Loos; B. Musgrave; Lawrence Price; James Schlereth; K. Sugano; J.M. Weiss; D.E. Wood; D. Blockus; B. Brabson; S.W. Gray; C. Jung; H. A. Neal; H. Ogren; D. R. Rust; M. Valdata-Nappi; C. Akerlof; G. Bonvicini; J. Chapman; D. Errede; N. Harnew; P. Kesten; D.I. Meyer; D. Nitz; A.A. Seidl; R. P. Thun; T. Trinko; M. Willutzky
The charged particle multiplicities of the quark and gluon jets in the three-fold symmetric e+e− → qqg events at √s = 29 GeV have been studied using the high resolution spectrometer at PEP. A value of 〈n〉g = 6.7−2.1+1.1±1.0 for gluon jet s with an energy of 9.7−2.0+1.5 GeV is measured. The ratio, 〈n〉g/〈n〉q, is 1.29−0.41+0.21±0.20, which i s significantly lower than the value of 94 naively expected from the ration of the gluon-to-quark color charges.
Physics Letters B | 1987
M. Derrick; P. Kooijman; J. S. Loos; B. Musgrave; L. E. Price; J. Repond; K. Sugano; D. Blockus; B. Brabson; J. M. Brom; C. Jung; H. A. Neal; H. Ogren; D. R. Rust; C. Akerlof; J. Chapman; D. Errede; M. T. Ken; D. Nitz; R. P. Thun; R. Tschirhart; S. Abachi; P. Baringer; B.G. Bylsma; R. DeBonte; D. Koltick; F. J. Loeffler; E. H. Low; R. L. McIlwain; D. H. Miller
Abstract The inclusive production of η mesons in tau lepton decay has been studied using the High Resolution Spectrometer at the PEP e + e - facility. The data sample corresponds to an integrated luminosity of 300 pb −1 and the storage ring was operated at GeV. The η production appeaars to be only compatible with the decay τ + →π + η ν , which violates isospin and G -parity conservation. The branching ratio of 5.1±1.5% explains much of the current discrepancy between the one-prong topological branching ratio and the sum of the individual one-prong modes.
Physics Letters B | 1979
M. Abolins; R. Barate; P. Bareyre; P. Bonamy; P. Borgeaud; J.C. Brisson; M. David; J. Ernwein; F.X. Gentit; G. Laurens; Y. Lemoigne; J. Pascual; J. Poinsignon; A. Roussarie; G. Villet; S. Zaninotti; P. Astbury; A. Duane; G.J. King; Daniel Pitkin Owen; D.J. Pittuck; D. Websdale; M. Williams; Ann G. Wylie; J.G. McEwen; B. Brabson; R.R. Crittenden; R. Heinz; J. Krider; T. Marshall
Abstract In a large-acceptance spectrometer, muon pairs and associated hadrons were observed with μμ masses up to 10 GeV/c2 and ΔM M = 0.015 resolution. We report here on the production of 4000 J/ψ and 80 ψ′ mesons.
Physics Letters B | 1985
M. Derrick; P. Kooijman; J. S. Loos; B. Musgrave; L. E. Price; J. L. Schlereth; K. Sugano; J.M. Weiss; D.E. Wood; P. Baringer; D. Blockus; B. Brabson; S.W. Gray; C. Jung; H. A. Neal; H. Ogren; D. R. Rust; M. Valdata-Nappi; C. Akerlof; G. Bonvicini; J. Chapman; D. Errede; N. Harnew; P. Kesten; D. I. Meyer; D. Nitz; A.A. Seidl; R. P. Thun; T. Trinko; M. Willutzky
Abstract The production of neutral K∗(890) and ρ0 mesons was studied in e+e− annihilation at s =29 GeV using the High Resolution Spectrometer at PEP. Differential cross sections are presented as a function of the scaled energy variable z and compared to π0 and K0 production. The measured multiplicities are 0.84±0.08 ϱ0 mesons and 0.57±0.09 K ∗0 (890) mesons per event for a meson momentum greater than 725 MeV/c. The ratios of vector meson to pseudoscalar meson production for (u,d), s and c quark are compared to predictions of the Lund model.
Physics Letters B | 1984
M. Derrick; E. Fernandez; R. Fries; L. Hyman; P. Kooijman; J. S. Loos; B. Musgrave; L. E. Price; J. L. Schlereth; K. Sugano; J.M. Weiss; D.E. Wood; S. Ahlen; G. Baranko; P. Baringer; D. Blockus; B. Brabson; M. Daigo; G. E. Forden; S.W. Gray; J.-P. Guillaud; C. Jung; H. A. Neal; H. Ogren; D. R. Rust; M. Valdata-Nappi; C. Akerlof; J. Chapman; D. Errede; N. Harnew
Abstract The electroweak production asymmetry and the decay fragmentation function for e + e − → c c have been measured at s = 29 GeV using charged D ∗ production over the full kinematic range. The data were taken at PEP using the High Resolution Spectrometer. The measured asymmetry is −0.12 ± 0.08. The total production cross section in units of the point cross section corrected for initial state radiation is R D ∗ = 2.7 ± 0.9 .
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1997
R.R. Crittenden; A. Dzierba; J. Gunter; R. Lindenbusch; D. R. Rust; E. Scott; P. Smith; T. Sulanke; S. Teige; B. Brabson; T. Adams; J.M. Bishop; N. M. Cason; J. M. LoSecco; J. J. Manak; A. H. Sanjari; W. D. Shephard; D.L. Steinike; S.A. Taegar; D.R. Thompson; S. U. Chung; R. Hackenburg; C. Olchanski; Dennis P. Weygand; H.J. Willutzki; Sergey Denisov; A. Dushkin; V. Kochetkov; V. V. Lipaev; A. V. Popov
Abstract A 3045 element lead glass calorimeter and an associated fast trigger processor have been constructed, tested and implemented in BNL experiment E852 in conjunction with the multi-particle spectrometer (MPS). Approximately, 10 9 all-neutral and neutral plus charged triggers were recorded with this apparatus during data runs in 1994 and 1995. This paper reports on the construction, testing and performance of this lead glass calorimeter and the associated trigger processor.