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Title: A preliminary improved test of the flavor independence of strong interactions

Abstract

The authors present an improved comparison of the strong couplings of gluons to light (u, d, and s), c, and b quarks, determined from multijet rates in flavor-tagged samples of hadronic Z{sup 0} decays recorded with the SLC Large Detector at the SLAC Linear Collider between 1993 and 1995. Flavor separation on the basis of lifetime and decay multiplicity differences among hadrons containing light, c, and b quarks was made using the SLD precision tracking system, yielding tags with high purity and low bias against {ge} 3-jet final states. They find: {alpha}{sub s}{sup uds}/{alpha}{sub s}{sup all} = 0.997 {+-} 0.011(stat) {+-} 0.011(syst) {+-} 0.005(theory), {alpha}{sub s}{sup c}/{alpha}{sub s}{sup all} = 0.984 {+-} 0.042 {+-} 0.053 {+-} 0.022, {alpha}{sub s}{sup b}/{alpha}{sub s}{sup all} = 1.022 {+-} 0.019 {+-} 0.023 {+-} 0.012.

Authors:
 [1];  [2];  [3];
  1. Nagoya Univ. (Japan)
  2. Tohoku Univ., Sendai (Japan)
  3. Stanford Univ., CA (United States). Stanford Linear Accelerator Center [and others
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (United States); Boston Univ., MA (United States); California Univ., Santa Barbara, CA (United States); California Univ., Santa Cruz, CA (United States); Colorado State Univ., Fort Collins, CO (United States); Colorado Univ., Boulder, CO (United States); Illinois Univ., Urbana, IL (United States); Lawrence Berkeley Lab., CA (United States); Massachusetts Univ., Amherst, MA (United States); Massachusetts Inst. of Tech., Cambridge, MA (United States); Oregon Univ., Eugene, OR (United States); Tennessee Univ., Knoxville, TN (United States); Wisconsin Univ., Madison, WI (United States); Yale Univ., New Haven, CT (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States); United Kingdom Particle Physics and Astronomy Research Council (United Kingdom); Istituto Nazionale di Fisica Nucleare, Rome (Italy); Japan-US Cooperative Research Project on High Energy Physics, Nagoya (Japan); Korea Science and Engineering Foundation (Korea, Republic of)
OSTI Identifier:
537337
Report Number(s):
SLAC-PUB-7573; CONF-970787-5
ON: DE97007263; CNN: Contract PHY-91-13428;PHY-89-21320;PHY-92-04239;PHY-95-10439;PHY-88-19316;PHY-92-03212; TRN: 97:019535
DOE Contract Number:  
AC03-76SF00515; FG02-91ER40676; FG03-91ER40618; FG03-92ER40689; FG03-93ER40788; FG02-91ER40672; FG02-91ER40677; AC03-76SF00098; FG02-92ER40715; FC02-94ER40818; FG03-96ER40969; FG02-91ER40627; FG02-95ER40896; FG02-92ER40704
Resource Type:
Conference
Resource Relation:
Conference: 18. international symposium on lepton photon interactions, Hamburg (Germany), 28 Jul - 1 Aug 1997; Other Information: PBD: Jun 1997
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; COUPLING CONSTANTS; QUANTUM CHROMODYNAMICS; QUARKS; GLUONS; Z NEUTRAL BOSONS; HADRONIC PARTICLE DECAY; COUPLING; PARTICLE DISCRIMINATION; TESTING; STRONG INTERACTIONS

Citation Formats

Abe, K., Abe, K., Akagi, T., and SLD Collaboration. A preliminary improved test of the flavor independence of strong interactions. United States: N. p., 1997. Web.
Abe, K., Abe, K., Akagi, T., & SLD Collaboration. A preliminary improved test of the flavor independence of strong interactions. United States.
Abe, K., Abe, K., Akagi, T., and SLD Collaboration. Sun . "A preliminary improved test of the flavor independence of strong interactions". United States. https://www.osti.gov/servlets/purl/537337.
@article{osti_537337,
title = {A preliminary improved test of the flavor independence of strong interactions},
author = {Abe, K. and Abe, K. and Akagi, T. and SLD Collaboration},
abstractNote = {The authors present an improved comparison of the strong couplings of gluons to light (u, d, and s), c, and b quarks, determined from multijet rates in flavor-tagged samples of hadronic Z{sup 0} decays recorded with the SLC Large Detector at the SLAC Linear Collider between 1993 and 1995. Flavor separation on the basis of lifetime and decay multiplicity differences among hadrons containing light, c, and b quarks was made using the SLD precision tracking system, yielding tags with high purity and low bias against {ge} 3-jet final states. They find: {alpha}{sub s}{sup uds}/{alpha}{sub s}{sup all} = 0.997 {+-} 0.011(stat) {+-} 0.011(syst) {+-} 0.005(theory), {alpha}{sub s}{sup c}/{alpha}{sub s}{sup all} = 0.984 {+-} 0.042 {+-} 0.053 {+-} 0.022, {alpha}{sub s}{sup b}/{alpha}{sub s}{sup all} = 1.022 {+-} 0.019 {+-} 0.023 {+-} 0.012.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {6}
}

Conference:
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