Upsilon Production And Polarization In P(P)Over-Bar Collisions At Root S=1.8 Tev

D. Acosta,T. Affolder,H. Akimoto,M. Albrow, P. Amaral,D. Ambrose, D. Amidei,K. Anikeev, J. Antos, G. Apollinari,T. Arisawa,A. Artikov,T. Asakawa,W. Ashmanskas, F. Azfar,P. Azzi-Bacchetta, N. Bacchetta, H. Bachacou,S. Bailey,P. de Barbaro, A. Barbaro-Galtieri,V. Barnes, B. Barnett,S. Baroiant,M. Barone, G. Bauer,F. Bedeschi, S. Belforte,W. Bell, G. Bellettini, J. Bellinger, D. Benjamin,J. Bensinger, A. Beretvas,J. Berge, J. Berryhill, A. Bhatti,M. Binkley, D. Bisello,M. Bishai,R. Blair,C. Blocker,K. Bloom, B. Blumenfeld,S. Blusk, A. Bocci,A. Bodek, G. Bolla,Y. Bonushkin,D. Bortoletto, J. Boudreau,A. Brandl,S. van den Brink,C. Bromberg,M. Brozovic,E. Brubaker,N. Bruner,E. Buckley-Geer, J. Budagov,H. Budd, K. Burkett,G. Busetto,A. Byon-Wagner,K. Byrum,S. Cabrera,P. Calafiura,M. Campbell,W. Carithers,J. Carlson, D. Carlsmith,W. Caskey, A. Castro, D. Cauz, A. Cerri,A. Chan,P. Chang,J. Chapman, C. Chen,Y. Chen,M.-T. Cheng, M. Chertok,G. Chiarelli,I. Chirikov-Zorin,G. Chlachidze, F. 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PHYSICAL REVIEW LETTERS（2002）

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摘要

We report on measurements of the Y(1S), Y(2S), and Y(3S) differential cross sections (d(2)sigma/dp(T)dy)(\y\<0.4) , as well as on the &UUpsilon;(1S) polarization in p<(p)over bar> collisions at roots = 1.8 TeV using a sample of 77+/-3 pb(-1) collected by the collider detector at Fermilab. The three resonances were reconstructed through the decay Y-->mu(+)mu(-) . The measured angular distribution of the muons in the Y(1S) rest frame is consistent with unpolarized meson production.

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