J. Langland

Copper-scintillating fiber hadron calorimeter tower prototypes

D. H. Brown, R. M. Carey, Simon Dye, Eric Hazen et autres

The authors have constructed and tested seven projective scintillating fiber-copper absorber hadron calorimeter towers for high-energy hadron collider detectors. Each tower contained 2.25% by volume scintillating fibers, embedded between copper laminations, 10.6 lambda deep. A hadron energy resolution of sigma /E=91%/ square …

us (code pays fourni par la source)

Measurement of the (Sigma)over-bar(-) lifetime and direct comparison with the Sigma(+) lifetime

RF Barbosa, I. F. M. Albuquerque, NF Bondar, R. A. Carrigan et autres

We have measured the lifetime of the (-) using the Fermilab, Proton Center 375 GeV/c charged hyperon beam. We obtained (80.43+/-0.80+/-0.14) ps. We also measured the lifetime of the Sigma(+), obtaining (80.38 +/-0.40+/-0.14) ps, in agreement with the Particle Data Group value. …

Measurement of the Σ¯− lifetime and direct comparison with the Σ+ lifetime

R. F. Barbosa, I. F. M. Albuquerque, Nikolay Bondar, R. A. Carrigan et autres

We have measured the lifetime of the ${\overline{\ensuremath{\Sigma}}}^{\ensuremath{-}}$ using the Fermilab Proton Center 375 GeV/$c$ charged hyperon beam. We obtained $(80.43\ifmmode\pm\else\textpm\fi{}0.80\ifmmode\pm\else\textpm\fi{}0.14)$ ps. We also measured the lifetime of the ${\ensuremath{\Sigma}}^{+},$ obtaining $(80.38\ifmmode\pm\else\textpm\fi{}0.40\ifmmode\pm\else\textpm\fi{}0.14)$ ps, in agreement with the Particle Data Group value. A …

On the differences between high-energy proton and pion showers and their signals in a non-compensating calorimeter

N. Akchurin, S. Ayan, G. Bencze, K. A. Chikin et autres

us, tr, hu, ru, es, it, fr (code pays fourni par la source)

Test beam results of CMS quartz fibre calorimeter prototype and simulation of response to high energy hadron jets

N. Akchurin, S. Ayan, G. Bencze, K. A. Chikin et autres

us, tr, hu, ru, es, it (code pays fourni par la source)

Test beam of a quartz-fibre calorimeter prototype with a passive front section

N. Akchurin, S. Ayan, G. Bencze, K. A. Chikin et autres

us, tr, hu, es, it (code pays fourni par la source)

Beam test results from a fine-sampling quartz fiber calorimeter for electron, photon and hadron detection

N. Akchurin, S. Ayan, G. Bencze, K. A. Chikin et autres

us, tr, hu, ru, es, it (code pays fourni par la source)

Search for Light Supersymmetric Baryons

I. F. M. Albuquerque, N. F. Bondar, R. A. Carrigan, D. Chen et autres

We have searched for the production and decay of light supersymmetric baryons produced in $800\mathrm{GeV}/c$ proton copper interactions in a charged hyperon beam experiment. We observe no evidence for the decays ${R}^{+}(\mathrm{uud}\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g})\ensuremath{\rightarrow}{S}^{0}(\mathrm{uds}\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g}){\ensuremath{\pi}}^{+}$ and ${X}^{\ensuremath{-}}(\mathrm{ssd}\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g})\ensuremath{\rightarrow}{S}^{0}(\mathrm{uds}\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g}){\ensuremath{\pi}}^{\ensuremath{-}}$ …

br, ru, us, gb, cn (code pays fourni par la source)

Hyperon and Antihyperon Production in Proton-Copper Interactions

J. Langland

Analyzing Power Measurement in Inclusive Λ0 Production with a 200GeV/c Polarized Proton Beam

ALESSANDRO BRAVAR, D. L. Adams, N. Akchurin, N.I. Belikov et autres

The considerable polarization of hyperons produced at high ${x}_{F}$ has been known for a long time and has been interpreted with various theoretical models in terms of the constituents' spin. Recently, the analyzing power in inclusive ${\ensuremath{\Lambda}}^{0}$ hyperon production has also been …

Measurement of the branching ratio and asymmetry parameter for the Σ+ →pγ radiative decay

Steven C. Timm, I. F. M. Albuquerque, N. F. Bondar, R. A. Carrigan et autres

We have measured the branching ratio for the hyperon radiative decay ${\mathrm{\ensuremath{\Sigma}}}^{+}$\ensuremath{\rightarrow}p\ensuremath{\gamma} using the Fermilab polarized charged hyperon beam. This measurement and our previously published result on the asymmetry parameter in the same decay are part of Fermilab experiment E761. We find …

Analyzing power measurement of pp elastic scattering in the Coulomb-nuclear interference region with the 200-GeV/cpolarized-proton beam at Fermilab

N. Akchurin, J. Langland, Y. Onel, B. E. Bonner et autres

The analyzing power ${A}_{N}$ of proton-proton elastic scattering in the Coulomb-nuclear interference region has been measured using the 200-GeV/c Fermilab polarized proton beam. A theoretically predicted interference between the hadronic non-spin-flip amplitude and the electromagnetic spin-flip amplitude is shown for the first …

us, ch, fr, jp, it (code pays fourni par la source)