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Title: VALUE OF MEASURING SINGLE PARTICLE INCLUSIVE CROSS SECTIONS AT 90$sup 0$ IN THE ISABELLE CM FRAME.

Authors:
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, N. Y.
OSTI Identifier:
4633031
Report Number(s):
BNL-17154
NSA Number:
NSA-26-056844
Resource Type:
Technical Report
Resource Relation:
Other Information: UNCL. Orig. Receipt Date: 31-DEC-72
Country of Publication:
United States
Language:
English
Subject:
N54600* -Particle Accelerators-Experimental Facilities; N64130 -Physics (High Energy)-Particle Interactions & Properties (Experimental)-Strong (Baryon-induced); ACCELERATOR FACILITIES; CROSS SECTIONS; HADRONS; ISABELLE; SPECTROMETERS; STRONG INTERACTIONS; STORAGE RINGS/experimental facility for ISABELLE, for measuring single particle inclusive cross sections at 90-

Citation Formats

Slattery, P. VALUE OF MEASURING SINGLE PARTICLE INCLUSIVE CROSS SECTIONS AT 90$sup 0$ IN THE ISABELLE CM FRAME.. United States: N. p., 1972. Web. doi:10.2172/4633031.
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Slattery, P. VALUE OF MEASURING SINGLE PARTICLE INCLUSIVE CROSS SECTIONS AT 90$sup 0$ IN THE ISABELLE CM FRAME.. United States. doi:10.2172/4633031.
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Slattery, P. Sat . "VALUE OF MEASURING SINGLE PARTICLE INCLUSIVE CROSS SECTIONS AT 90$sup 0$ IN THE ISABELLE CM FRAME.". United States. doi:10.2172/4633031. https://www.osti.gov/servlets/purl/4633031.
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@article{osti_4633031,
title = {VALUE OF MEASURING SINGLE PARTICLE INCLUSIVE CROSS SECTIONS AT 90$sup 0$ IN THE ISABELLE CM FRAME.},
author = {Slattery, P.},
abstractNote = {},
doi = {10.2172/4633031},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1972},
month = {Sat Jan 01 00:00:00 EST 1972}
}
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Technical Report:
View Technical Report (0.22 MB)
DOI:  10.2172/4633031
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  • We have measured the inclusive cross section for ..pi../sup 0/ production at small center of mass (CM) polar angles in an experiment conducted at the CERN Intersecting Storage Rings. The cross section is presented as a function of transverse momentum for the following values of CM polar angle (theta) and CM energy (..sqrt..s): at ..sqrt..s = 23.3 GeV, theta approx. = 90/sup 0/, 22/sup 0/, 20/sup 0/, 17 1/2/sup 0/, and 15/sup 0/ with 1 < P/sub T/(GeV/c) < 2.5 - at ..sqrt..S = 52.8 GeV, theta approx. = 90/sup 0/, 22/sup 0/, 20/sup 0/, 17 1/2/sup 0/, 15/sup 0/,more » 12/sup 0/, 10/sup 0/, 7 1/2/sup 0/, and 5/sup 0/ with 1 < P/sub T/(GeV/c) < 4. The measured cross section is compared to two models. The black-box model of Feynman, Field, and Fox is in agreement with our results: the hypothesis of radial scaling is incompatible with them.« less

  • The Moliere approximation to the Thomas-Fermi screening function was used in a screened Coulomb potential to calculate tables of differential scattering cross sections for laboratory scattering angles of 90 and 138/sup 0/. Data are provided for incident ions of /sup 3/He/sup +/ and /sup 20/Ne/sup +/ as a function of energy (0.05 to 5.0 keV) and target atom. 3 references.

  • This dissertation describes a portion of the results from experiment SP19 conducted by the Maryland-Pavia-Princeton (MP/sup 2/) collaboration at the e/sup +/e/sup -/ storage ring SPEAR II at the Stanford Linear Accelerator Center. The inclusive measurements described were obtained in the 6 and 7 GeV center-of-mass energy regions using a small solid angle (..delta cap omega../sub MAX/ = 0.085 sr) magnetic spectrometer situated at 90/sup 0/ +- 13/sup 0/ with respect to the beams. The spectrometer and a conjugate detector opposite the spectrometer were used to measure back-to-back Bhabhas and muons, and the latter were used to normalize results. Themore » inclusive muon signal at <..sqrt..3> = 7.3 GeV with observed multiplicity n/sub CH/ = 2, acoplanarity par. delta/sub A/ > 20/sup 0/ and momentum p > 1.15 GeV/c is found to be in excess of QED and expected backgrounds. The background subtracted inclusive cross section is 10.1 +- 5.4 pb/sr. Both the momentum spectrum and the muon branching ratio of b/sub mu/ = 0.17 +- 0.09 are found to be consistent with the tau. An excess of events above expected backgrounds is also observed in those muons with n/sub CH/ > 2 and p > 1.15 GeV/c. The inclusive background subtracted cross section at <..sqrt..3> = 7.3 GeV of 19.0 +- 6.3 pb/sr cannot be explained by the tau and may indicate the weak decays of charmed mesons. 5 references.« less

  • ; ;
    An apparatus consisting of a superconducting solenoidal magnet, cylindrical drift chambers and two arrays of lead glass Cerenkov counters at the CERN ISR has been used to study p-p collisions in which a ..pi../sup 0/ of large p/sub T/ is produced near 90/sup 0/. The inclusive cross section for single ..pi../sup 0/ production at centre-of-mass energies 30.7, 53.1 and 62.4 GeV is presented. The data are found to be inconsistent with scaling of the form p/sub T/sup -n/ F(x/sub T/), where x/sub T/ = 2p/sub T//..sqrt..s.

  • This dissertation describes an experiment which measured the inclusive momentum spectra for hadrons and muons produced in e/sup +/e/sup -/ interactions at total center of mass energies of 3.8 and 4.8 GeV. The experiment was performed at the SPEAR electron-positron storage ring at the Stanford Linear Accelerator Center. It consisted of a single-arm spectrometer, with additional apparatus to measure charged multiplicities and to tag collinear muon and electron pairs. The Lorentz-invariant cross section for hadrons is found to exhibit Feynman scaling at all measured momenta. The invariant cross sections for pions, kaons and protons fell along the same exponential energymore » curve, exhibiting a characteristic hadron temperature of kT = 0.19 GeV. Bjorken scaling was found to hold separately for pions and for kaons for x = 2E/..sqrt..s > 0.4; however, the x-dependence of the two cross sections are significantly different. Results are also presented for the inclusive momentum distributions of the hadron charged multiplicity. An examination of inclusive muon production found the presence of a small anomalous muon signal for two-prong events noncoplanar by more than 20/sup 0/ and with p/sub ..mu../ > 1.05 GeV/c; dsigma/domega/sub 90/sup 0// = 17/sup +12//sub -9/ pb/sr. Known processes accounted for the observed muon events having charged multiplicity greater than 2, giving an upper limit at the 95% confidence level of dsigma/domega/sub 90/sup 0// < 7.5 pb/sr for any new process.« less