D. Hubbard
University of Michigan
6 Papers
12 Citations
D. Hubbard is an academic researcher from University of Michigan. The author has contributed to research in topics: Photon & Proton. The author has an hindex of 4, co-authored 6 publications. Previous affiliations of D. Hubbard include Ericsson.
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Papers
Direct photon production in pp and pp interactions at √s = 24.3 GeV
G. Sozzi,G. Ballocchi,A. Bernasconi,R. E. Breedon,L. Camilleri,R.L. Cool,P.T. Cox,P. Cushman,P. Cushman,Louis Dick,E.C. Dukes,B. Gabioud,F. Gaille,Paolo Giacomelli,Paolo Giacomelli,D. Hubbard,J.B. Jeanneret,C. Joseph,W. Kubischta,J. F. Loude,E. Malamud,C. Morel,P. Oberson,Oliver E. Overseth,J.L. Pagès,J.L. Pagès,J. P. Perroud,D. Ruegger,Roger Rusack,V. Singh,Gregory R Snow,D. Steiner,L. Studer,M. T. Tran,A. Vacchi,G. Valenti,M. Werlen +36 more
TL;DR: In this paper, the first measurement of the difference of the p p and pp cross sections was performed at the CERN SPS, where the direct photon cross section in p p collisions was systematically larger than that in pp collisions, which indicates a significant contribution of the q q annihilation term as predicted by theoretical calculations.
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A lead/proportional-tube electromagnetic calorimeter for direct photon detection
L. Camilleri,L. Dick,J.B. Jeanneret,G. Von Dardel,S. Baumann,A. Bernasconi,B. Gabioud,F. Gaille,C. Joseph,J. F. Loude,C. Morel,J.L. Pages,J. P. Perroud,D. Ruegger,G. Sozzi,D. Steiner,L. Studer,M. T. Tran,E.C. Dukes,D. Hubbard,Oliver E. Overseth,C. Rivers,Gregory R Snow,G. Valenti,R. E. Breedon,R. L. Cool,P.T. Cox,P. Cushman,P. Giacomelli,Roger Rusack,A. Vacchi +30 more
TL;DR: The fine-grained lead/proportional-tube electromagnetic calorimeter used in CERN experiment UA6 is described in this paper, which demonstrates linear energy response over a wide dynamic range, position resolution for shower localization reaching 1.7 mm.
Final NOMAD results on µ ! and e ! oscillations including a new search for appearance using hadronicdecays.
P. Astier,D. Autiero,M. Baldo-Ceolin,G. Bassompierre,K. Benslama,Barry Blumenfeld,F. Bobisut,J. Bouchez,S. Boyd,Antonio Bueno,S.A. Bunyatov,L. Camilleri,Alessandro Cardini,Vincenzo Cavasinni,A. Cervera-Villanueva,Artem Chukanov,G. Collazuol,G. Conforto,C. Conta,R. Cousins,D. Daniels,H. Degaudenzi,T. Del Prete,J. Dumarchez,Malcolm Ellis,Roberto Ferrari,A. Geiser,D. Geppert,D. Gibin,Sergei Gninenko,A. Godley,J. Gosset,A. Guglielmi,Caren Hagner,J.A. Hernando,D. Hubbard,P. Hurst,N. Hyett,E. Iacopini,C. Joseph,F. Juget,Mikhail Kirsanov,O.L. Klimov,J. Kokkonen,A. Kovzelev,A. Krasnoperov,D. Kustov,C. Lachaud,A. Lanza,L. La Rotonda +49 more
- 01 Jan 2008
Determination of αs and the gluon distribution using direct photon production in pp and pp collisions
G. Ballocchi,A. Bernasconi,R. E. Breedon,L. Camilleri,R.L. Cool,P.T. Cox,P. Cushman,P. Cushman,Louis Dick,E.C. Dukes,B. Gabioud,F. Gaille,Paolo Giacomelli,Paolo Giacomelli,D. Hubbard,J.B. Jeanneret,C. Joseph,W. Kubischta,J. F. Loude,E. Malamud,C. Morel,P. Oberson,Oliver E. Overseth,J.L. Pagès,J.L. Pagès,J. P. Perroud,D. Ruegger,Roger Rusack,V. Singh,Gregory R Snow,G. Sozzi,D. Steiner,L. Studer,M. T. Tran,A. Vacchi,G. Valenti,M. Werlen +36 more
TL;DR: In this article, a measurement of the strong coupling constant Λ (4) MS using direct photon data yields a value Λ 4 MS = 235 ± 79 (stat.) ± 70 (syst.) MeV.
A new determination of αs using direct photon production cross sections in pp and p̄p collisions at s=24.3 GeV
M. Werlen,M. Werlen,G. Ballocchi,G. Ballocchi,Richard Breedon,Richard Breedon,L. Camilleri,C. Comtat,C. Comtat,R.L. Cool,Peter Timothy Cox,Peter Timothy Cox,Peter Timothy Cox,P. Cushman,P. Cushman,P. Cushman,Louis Dick,E. C. Dukes,E. C. Dukes,P Giacomelli,P Giacomelli,D. Hubbard,J.B. Jeanneret,C. Joseph,W. Kubischta,C. Morel,M. C. Nguyen,P. Oberson,Oliver E. Overseth,J.L. Pages,J. P. Perroud,D. Ruegger,R.W Rusack,R.W Rusack,V. Singh,Gregory R Snow,G. Sozzi,L. Studer,M. T. Tran,A. Vacchi,G. Valenti +40 more
TL;DR: In this article, the strong coupling constant α s is derived from the cross section difference σ( p p → γX)−σ(pp → λX) and quark distributions measured in deep inelastic scattering.