Soft and hard interactions in pp collisions at s=1800 and 630 GeV Academic Article uri icon


  • We present a study of pp of collisions at s = 1800 and 630 GeV collected using a minimum bias trigger by the CDF experiment in which the data set is divided into two classes corresponding to "soft" and "hard" interactions. For each subsample, the analysis includes measurements of the multiplicity, transverse momentum (PT) spectrum, and the average PT and event-by-event PT dispersion as a function of multiplicity. A comparison of results shows distinct differences in the behavior of the two samples as a function of the center of mass (c.m.) energy. We find evidence that the properties of the soft sample are invariant as a function of c.m. energy.

published proceedings

  • Physical Review D - Particles, Fields, Gravitation and Cosmology

author list (cited authors)

  • Acosta, D., Affolder, T., Akimoto, H., Albrow, M. G., Amaral, P., Ambrose, D., ... Dagenhart, D.

complete list of authors

  • Acosta, D||Affolder, T||Akimoto, H||Albrow, MG||Amaral, P||Ambrose, D||Amidei, D||Anikeev, K||Antos, J||Apollinari, G||Arisawa, T||Artikov, A||Asakawa, T||Ashmanskas, W||Azfar, F||Azzi-Bacchetta, P||Bacchetta, N||Bachacou, H||Bailey, S||de Barbaro, P||Barbaro-Galtieri, A||Barnes, VE||Barnett, BA||Baroiant, S||Barone, M||Bauer, G||Bedeschi, F||Belforte, S||Bell, WH||Bellettini, G||Bellinger, J||Benjamin, D||Bensinger, J||Beretvas, A||Berge, JP||Berryhill, J||Bhatti, A||Binkley, M||Bisello, D||Bishai, M||Blair, RE||Blocker, C||Bloom, K||Blumenfeld, B||Blusk, SR||Bocci, A||Bodek, A||Bolla, G||Bonushkin, Y||Bortoletto, D||Boudreau, J||Brandl, A||van den Brink, S||Bromberg, C||Brozovic, M||Brubaker, E||Bruner, N||Buckley-Geer, E||Budagov, J||Budd, HS||Burkett, K||Busetto, G||Byon-Wagner, A||Byrum, KL||Cabrera, S||Calafiura, P||Campbell, M||Carithers, W||Carlson, J||Carlsmith, D||Caskey, W||Castro, A||Cauz, D||Cerri, A||Chan, AW||Chang, PS||Chang, PT||Chapman, J||Chen, C||Chen, YC||Cheng, MT||Chertok, M||Chiarelli, G||Chirikov-Zorin, I||Chlachidze, G||Chlebana, F||Christofek, L||Chu, ML||Chung, JY||Chung, YS||Ciobanu, CI||Clark, AG||Colijn, AP||Connolly, A||Convery, M||Conway, J||Cordelli, M||Cranshaw, J||Culbertson, R||Dagenhart, D

publication date

  • April 2002