A precision measurement of the A-dependence of dimuon production in proton-nucleus collisions at 800 GeV/c
| Main Author: | |
|---|---|
| Language: | English |
| Published: |
Case Western Reserve University School of Graduate Studies / OhioLINK
1991
|
| Subjects: | |
| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=case1055776533 |
| id |
ndltd-OhioLink-oai-etd.ohiolink.edu-case1055776533 |
|---|---|
| record_format |
oai_dc |
| spelling |
ndltd-OhioLink-oai-etd.ohiolink.edu-case10557765332021-08-03T05:30:27Z A precision measurement of the A-dependence of dimuon production in proton-nucleus collisions at 800 GeV/c Wang, Ming-Jer precision measurement A-dependence dimuon production proton-nucleus collisions <p>Precision measurements of the A-dependence of the reaction p + A → <i>μ</i><sup>+</sup><i>μ</i><sup>−</sup> + <i>X</i> at 800 GeV/c are reported in this thesis. Data were taken at Fermilab (E772) using a modified version of the large dimuon spectrometer in the Meson-East beamline. A total of 6 × 10<sup>5</sup> muon pairs were recorded for targets of D, C, Ca, Fe, and W. The kinematic region spanned by the data corresponds to a dimuon invariant mass of 3 ≤ <i>M</i><sub><i>μ</i><sup>+</sup><i>μ</i><sup>−</sup></sub> ≤ 14 GeV, a Feynman-x of -0.1 ≤ <i>x<sub>F</sub></i> ≤ 0.7, and a target parton momentum fraction of 0.03 ≤ <i>x</i><sub>2</sub> ≤ 0.30. Accurate relative target normalizations were achieved by careful monitoring of beam intensity and position, cyclic interchanges of targets, maintaining nearly 100% electronic livetime, and by use of precisely fabricated targets. The systematic errors in the relative yields are less than 2% for all targets.</p><p>Results are presented on the ratios of cross sections for nuclear targets relative to deuterium for the Drell-Yan process and for the production of the <i>J</i>/<i>Ψ</i>,<i>Ψ</i>′, and <i>Υ</i> quarkonia. These ratios are presented as functions of variables <i>P<sub>T</sub></i> and <i>x<sub>F</sub></i>, and versus <i>x</i><sub>1</sub> and <i>x</i><sub>2</sub> for the Drell-Yan process. Nuclear depletion at low-<i>x</i><sub>2</sub> is observed for the first time in the Drell-Ya n process. No nuclear enhancement of the antiquark distribution is observed in the region <i>x</i><sub>2</sub> ≥ 0.1. The data give tight constraints on models developed to explain nuclear medium effects in deep inelastic lepton scattering (EMC effect). Specifically, published models that have postulated a pion excess and 6-quark clusters are ruled out. The A-dependent behaviors on <i>x<sub>F</sub></i> and <i>P<sub>T</sub></i> for <i>J</i>/<i>Ψ</i>,<i>Ψ</i>′, and <i>Υ</i> production are also reported and compared with previous experiments. Substantial nuclear depletions are observed in both the <i>x<sub>F</sub></i> and <i>P<sub>T</sub></i> dependence. These depletions increase with increasing <i>x<sub>F</sub></i>, and decrease with increasing <i>P<sub>T</sub></i>.</p> 1991 English text Case Western Reserve University School of Graduate Studies / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=case1055776533 http://rave.ohiolink.edu/etdc/view?acc_num=case1055776533 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
precision measurement A-dependence dimuon production proton-nucleus collisions |
| spellingShingle |
precision measurement A-dependence dimuon production proton-nucleus collisions Wang, Ming-Jer A precision measurement of the A-dependence of dimuon production in proton-nucleus collisions at 800 GeV/c |
| author |
Wang, Ming-Jer |
| author_facet |
Wang, Ming-Jer |
| author_sort |
Wang, Ming-Jer |
| title |
A precision measurement of the A-dependence of dimuon production in proton-nucleus collisions at 800 GeV/c |
| title_short |
A precision measurement of the A-dependence of dimuon production in proton-nucleus collisions at 800 GeV/c |
| title_full |
A precision measurement of the A-dependence of dimuon production in proton-nucleus collisions at 800 GeV/c |
| title_fullStr |
A precision measurement of the A-dependence of dimuon production in proton-nucleus collisions at 800 GeV/c |
| title_full_unstemmed |
A precision measurement of the A-dependence of dimuon production in proton-nucleus collisions at 800 GeV/c |
| title_sort |
precision measurement of the a-dependence of dimuon production in proton-nucleus collisions at 800 gev/c |
| publisher |
Case Western Reserve University School of Graduate Studies / OhioLINK |
| publishDate |
1991 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=case1055776533 |
| work_keys_str_mv |
AT wangmingjer aprecisionmeasurementoftheadependenceofdimuonproductioninprotonnucleuscollisionsat800gevc AT wangmingjer precisionmeasurementoftheadependenceofdimuonproductioninprotonnucleuscollisionsat800gevc |
| _version_ |
1719421072480141312 |