Conference Paper/Proceeding/Abstract 1008 views
Target independence of the ‘proton spin’ effect
G.M. Shore,
Graham Shore
Nuclear Physics B - Proceedings Supplements, Volume: "39BC", Issue: 2-3, Pages: 101 - 105
Swansea University Author: Graham Shore
Full text not available from this repository: check for access using links below.
DOI (Published version): 10.1016/0920-5632(95)00051-A
Abstract
Recent work by the author in collaboration with S. Narison and G. Veneziano on the EMC-SMC-SLAC `proton spin' effect is reviewed. This uses a novel approach to deep inelastic scattering in which the matrix elements arising from the OPE are factorised into composite operator propagators and prop...
| Published in: | Nuclear Physics B - Proceedings Supplements |
|---|---|
| ISSN: | 09205632 |
| Published: |
1994
|
| Online Access: |
Check full text
|
| URI: | https://cronfa.swan.ac.uk/Record/cronfa31910 |
| first_indexed |
2017-02-09T20:45:12Z |
|---|---|
| last_indexed |
2018-02-09T05:19:16Z |
| id |
cronfa31910 |
| recordtype |
SURis |
| fullrecord |
<?xml version="1.0"?><rfc1807><datestamp>2017-02-09T13:49:28.7602509</datestamp><bib-version>v2</bib-version><id>31910</id><entry>2017-02-09</entry><title>Target independence of the ‘proton spin’ effect</title><swanseaauthors><author><sid>28a24f55687c82d6f3ee378ead3cf234</sid><firstname>Graham</firstname><surname>Shore</surname><name>Graham Shore</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2017-02-09</date><abstract>Recent work by the author in collaboration with S. Narison and G. Veneziano on the EMC-SMC-SLAC `proton spin' effect is reviewed. This uses a novel approach to deep inelastic scattering in which the matrix elements arising from the OPE are factorised into composite operator propagators and proper vertices. For polarised $\mu p$ scattering, the composite operator propagator is equated to the square root of the first moment of the QCD topological susceptibility, $\sqrt{\chi~\prime(0)}$. We evaluate $\chi~\prime(0)$ using QCD spectral sum rules and find a significant suppression relative to its OZI expectation. This is identified as the source of the violation of the Ellis-Jaffe sum rule for the first moment of the polarised proton structure function $g_1~p$. Our predictions, $\int_0~1 dx g_1~p(x;Q~2=10GeV~2) = 0.143\pm 0.005$ and $\Delta\Sigma =0.353\pm 0.052$, are in excellent agreement with the new SMC data. This supports our earlier conjecture that the suppression in the flavour singlet component of the first moment of $g_1~p$ is a target-independent feature of QCD related to the $U(1)$ anomaly and is not a special property of the proton</abstract><type>Conference Paper/Proceeding/Abstract</type><journal>Nuclear Physics B - Proceedings Supplements</journal><volume>"39BC"</volume><journalNumber>2-3</journalNumber><paginationStart>101</paginationStart><paginationEnd>105</paginationEnd><publisher/><issnPrint>09205632</issnPrint><keywords/><publishedDay>31</publishedDay><publishedMonth>7</publishedMonth><publishedYear>1994</publishedYear><publishedDate>1994-07-31</publishedDate><doi>10.1016/0920-5632(95)00051-A</doi><url>http://inspirehep.net/record/379257</url><notes/><college>COLLEGE NANME</college><CollegeCode>COLLEGE CODE</CollegeCode><institution>Swansea University</institution><apcterm/><lastEdited>2017-02-09T13:49:28.7602509</lastEdited><Created>2017-02-09T13:49:28.2610853</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Physics</level></path><authors><author><firstname>G.M.</firstname><surname>Shore</surname><order>1</order></author><author><firstname>Graham</firstname><surname>Shore</surname><order>2</order></author></authors><documents/><OutputDurs/></rfc1807> |
| spelling |
2017-02-09T13:49:28.7602509 v2 31910 2017-02-09 Target independence of the ‘proton spin’ effect 28a24f55687c82d6f3ee378ead3cf234 Graham Shore Graham Shore true false 2017-02-09 Recent work by the author in collaboration with S. Narison and G. Veneziano on the EMC-SMC-SLAC `proton spin' effect is reviewed. This uses a novel approach to deep inelastic scattering in which the matrix elements arising from the OPE are factorised into composite operator propagators and proper vertices. For polarised $\mu p$ scattering, the composite operator propagator is equated to the square root of the first moment of the QCD topological susceptibility, $\sqrt{\chi~\prime(0)}$. We evaluate $\chi~\prime(0)$ using QCD spectral sum rules and find a significant suppression relative to its OZI expectation. This is identified as the source of the violation of the Ellis-Jaffe sum rule for the first moment of the polarised proton structure function $g_1~p$. Our predictions, $\int_0~1 dx g_1~p(x;Q~2=10GeV~2) = 0.143\pm 0.005$ and $\Delta\Sigma =0.353\pm 0.052$, are in excellent agreement with the new SMC data. This supports our earlier conjecture that the suppression in the flavour singlet component of the first moment of $g_1~p$ is a target-independent feature of QCD related to the $U(1)$ anomaly and is not a special property of the proton Conference Paper/Proceeding/Abstract Nuclear Physics B - Proceedings Supplements "39BC" 2-3 101 105 09205632 31 7 1994 1994-07-31 10.1016/0920-5632(95)00051-A http://inspirehep.net/record/379257 COLLEGE NANME COLLEGE CODE Swansea University 2017-02-09T13:49:28.7602509 2017-02-09T13:49:28.2610853 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics G.M. Shore 1 Graham Shore 2 |
| title |
Target independence of the ‘proton spin’ effect |
| spellingShingle |
Target independence of the ‘proton spin’ effect Graham Shore |
| title_short |
Target independence of the ‘proton spin’ effect |
| title_full |
Target independence of the ‘proton spin’ effect |
| title_fullStr |
Target independence of the ‘proton spin’ effect |
| title_full_unstemmed |
Target independence of the ‘proton spin’ effect |
| title_sort |
Target independence of the ‘proton spin’ effect |
| author_id_str_mv |
28a24f55687c82d6f3ee378ead3cf234 |
| author_id_fullname_str_mv |
28a24f55687c82d6f3ee378ead3cf234_***_Graham Shore |
| author |
Graham Shore |
| author2 |
G.M. Shore Graham Shore |
| format |
Conference Paper/Proceeding/Abstract |
| container_title |
Nuclear Physics B - Proceedings Supplements |
| container_volume |
"39BC" |
| container_issue |
2-3 |
| container_start_page |
101 |
| publishDate |
1994 |
| institution |
Swansea University |
| issn |
09205632 |
| doi_str_mv |
10.1016/0920-5632(95)00051-A |
| college_str |
Faculty of Science and Engineering |
| hierarchytype |
|
| hierarchy_top_id |
facultyofscienceandengineering |
| hierarchy_top_title |
Faculty of Science and Engineering |
| hierarchy_parent_id |
facultyofscienceandengineering |
| hierarchy_parent_title |
Faculty of Science and Engineering |
| department_str |
School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics |
| url |
http://inspirehep.net/record/379257 |
| document_store_str |
0 |
| active_str |
0 |
| description |
Recent work by the author in collaboration with S. Narison and G. Veneziano on the EMC-SMC-SLAC `proton spin' effect is reviewed. This uses a novel approach to deep inelastic scattering in which the matrix elements arising from the OPE are factorised into composite operator propagators and proper vertices. For polarised $\mu p$ scattering, the composite operator propagator is equated to the square root of the first moment of the QCD topological susceptibility, $\sqrt{\chi~\prime(0)}$. We evaluate $\chi~\prime(0)$ using QCD spectral sum rules and find a significant suppression relative to its OZI expectation. This is identified as the source of the violation of the Ellis-Jaffe sum rule for the first moment of the polarised proton structure function $g_1~p$. Our predictions, $\int_0~1 dx g_1~p(x;Q~2=10GeV~2) = 0.143\pm 0.005$ and $\Delta\Sigma =0.353\pm 0.052$, are in excellent agreement with the new SMC data. This supports our earlier conjecture that the suppression in the flavour singlet component of the first moment of $g_1~p$ is a target-independent feature of QCD related to the $U(1)$ anomaly and is not a special property of the proton |
| published_date |
1994-07-31T04:00:15Z |
| _version_ |
1851726511969665024 |
| score |
11.090464 |