Study of inclusive. Lambda. production in e sup + e minus annihilations at 29 GeV
Abstract
Cross sections are presented for the inclusive production of {Lambda} hyperons in electron-positron annihilations at {radical}{ital s} =29 GeV based on the full 291-pb{sup {minus}1} sample of data taken in the High Resolution Spectrometer experiment at the SLAC {ital e}{sup +}{ital e}{minus} storage ring PEP. These results, and the associated correlation analyses, are consistent with the Lund model predictions with the strange diquark suppression ratio {delta} fixed at 0.59{plus minus}0.10{plus minus}0.18, as compared to the standard Lund value of 0.32. The {Lambda} multiplicity has been found to be 0.182{plus minus}0.020 per event. The opposite-strangeness multiplicity {l angle}{ital n}{sub {Lambda}}{Lambda}{bar a}{r angle} has been measured to be 0.046{plus minus}0.020, whereas the like-strangeness multiplicity {l angle}{ital n}{sub {Lambda}{Lambda}}+{bar {Lambda}}{bar {Lambda}}{r angle} is 0.009{plus minus}0.028. A strong correlation is found between {Lambda}'s and {bar {Lambda}} 's; when one is found in an event, the other is found in the same event with a probability that exceeds 50%.
- Authors:
-
more »
- University of Michigan, Ann Arbor, Michigan 48109 (United States)
- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Indiana University, Bloomington, Indiana 47405 (United States)
- Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
- Purdue University, West Lafayette, Indiana 47907 (United States)
- Publication Date:
- OSTI Identifier:
- 7106361
- DOE Contract Number:
- AC02-84ER40125
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review, D (Particles Fields); (United States)
- Additional Journal Information:
- Journal Volume: 45:11; Journal ID: ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRON-POSITRON INTERACTIONS; ANNIHILATION; LAMBDA PARTICLES; PARTICLE PRODUCTION; BARYONS; CROSS SECTIONS; FRAGMENTATION; GEV RANGE 10-100; INCLUSIVE INTERACTIONS; LUMINOSITY; MULTIPLICITY; PEP STORAGE RINGS; QUARKS; SPECTROMETERS; STRANGENESS; BASIC INTERACTIONS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; HYPERONS; INTERACTIONS; LAMBDA BARYONS; LEPTON-LEPTON INTERACTIONS; MEASURING INSTRUMENTS; OPTICAL PROPERTIES; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; POSTULATED PARTICLES; STORAGE RINGS; STRANGE PARTICLES; 662310* - Weak & Electromagnetic Interactions of Leptons- (1992-)
Citation Formats
Geld, T L, Neal, H, Akerlof, C, Chapman, J, Errede, D, Ken, M T, Kesten, P, Meyer, D I, Nitz, D, Thun, R, Tschirhart, R, Abachi, S, Derrick, M, Kooijman, P, Musgrave, B, Price, L, Repond, J, Sugano, K, Blockus, D, Brabson, B B, Brom, J, Jung, C, Ogren, H, Rust, D R, Snyder, A, Cork, B, Baringer, P, Bylsma, B G, Debonte, R, Low, E H, McIlwain, R L, Miller, D H, Ng, C R, Rangan, K, Shibata, E, and HRS Collaboration). Study of inclusive. Lambda. production in e sup + e minus annihilations at 29 GeV. United States: N. p., 1992.
Web. doi:10.1103/PhysRevD.45.3949.
Geld, T L, Neal, H, Akerlof, C, Chapman, J, Errede, D, Ken, M T, Kesten, P, Meyer, D I, Nitz, D, Thun, R, Tschirhart, R, Abachi, S, Derrick, M, Kooijman, P, Musgrave, B, Price, L, Repond, J, Sugano, K, Blockus, D, Brabson, B B, Brom, J, Jung, C, Ogren, H, Rust, D R, Snyder, A, Cork, B, Baringer, P, Bylsma, B G, Debonte, R, Low, E H, McIlwain, R L, Miller, D H, Ng, C R, Rangan, K, Shibata, E, & HRS Collaboration). Study of inclusive. Lambda. production in e sup + e minus annihilations at 29 GeV. United States. https://doi.org/10.1103/PhysRevD.45.3949
Geld, T L, Neal, H, Akerlof, C, Chapman, J, Errede, D, Ken, M T, Kesten, P, Meyer, D I, Nitz, D, Thun, R, Tschirhart, R, Abachi, S, Derrick, M, Kooijman, P, Musgrave, B, Price, L, Repond, J, Sugano, K, Blockus, D, Brabson, B B, Brom, J, Jung, C, Ogren, H, Rust, D R, Snyder, A, Cork, B, Baringer, P, Bylsma, B G, Debonte, R, Low, E H, McIlwain, R L, Miller, D H, Ng, C R, Rangan, K, Shibata, E, and HRS Collaboration). 1992.
"Study of inclusive. Lambda. production in e sup + e minus annihilations at 29 GeV". United States. https://doi.org/10.1103/PhysRevD.45.3949.
@article{osti_7106361,
title = {Study of inclusive. Lambda. production in e sup + e minus annihilations at 29 GeV},
author = {Geld, T L and Neal, H and Akerlof, C and Chapman, J and Errede, D and Ken, M T and Kesten, P and Meyer, D I and Nitz, D and Thun, R and Tschirhart, R and Abachi, S and Derrick, M and Kooijman, P and Musgrave, B and Price, L and Repond, J and Sugano, K and Blockus, D and Brabson, B B and Brom, J and Jung, C and Ogren, H and Rust, D R and Snyder, A and Cork, B and Baringer, P and Bylsma, B G and Debonte, R and Low, E H and McIlwain, R L and Miller, D H and Ng, C R and Rangan, K and Shibata, E and HRS Collaboration)},
abstractNote = {Cross sections are presented for the inclusive production of {Lambda} hyperons in electron-positron annihilations at {radical}{ital s} =29 GeV based on the full 291-pb{sup {minus}1} sample of data taken in the High Resolution Spectrometer experiment at the SLAC {ital e}{sup +}{ital e}{minus} storage ring PEP. These results, and the associated correlation analyses, are consistent with the Lund model predictions with the strange diquark suppression ratio {delta} fixed at 0.59{plus minus}0.10{plus minus}0.18, as compared to the standard Lund value of 0.32. The {Lambda} multiplicity has been found to be 0.182{plus minus}0.020 per event. The opposite-strangeness multiplicity {l angle}{ital n}{sub {Lambda}}{Lambda}{bar a}{r angle} has been measured to be 0.046{plus minus}0.020, whereas the like-strangeness multiplicity {l angle}{ital n}{sub {Lambda}{Lambda}}+{bar {Lambda}}{bar {Lambda}}{r angle} is 0.009{plus minus}0.028. A strong correlation is found between {Lambda}'s and {bar {Lambda}} 's; when one is found in an event, the other is found in the same event with a probability that exceeds 50%.},
doi = {10.1103/PhysRevD.45.3949},
url = {https://www.osti.gov/biblio/7106361},
journal = {Physical Review, D (Particles Fields); (United States)},
issn = {0556-2821},
number = ,
volume = 45:11,
place = {United States},
year = {Mon Jun 01 00:00:00 EDT 1992},
month = {Mon Jun 01 00:00:00 EDT 1992}
}