Nucleon structure from Lattice QCD using a nearly physical pion mass
We report the first Lattice QCD calculation using the almost physical pion mass mπ=149 MeV that agrees with experiment for four fundamental isovector observables characterizing the gross structure of the nucleon: the Dirac and Pauli radii, the magnetic moment, and the quark momentum fraction. The ke...
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| Veröffentlicht in: | Physics Letters B 2014-06, Vol.734, p.290-295 |
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| container_title | Physics Letters B |
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| creator | Green, J.R. Engelhardt, M. Krieg, S. Negele, J.W. Pochinsky, A.V. Syritsyn, S.N. |
| description | We report the first Lattice QCD calculation using the almost physical pion mass mπ=149 MeV that agrees with experiment for four fundamental isovector observables characterizing the gross structure of the nucleon: the Dirac and Pauli radii, the magnetic moment, and the quark momentum fraction. The key to this success is the combination of using a nearly physical pion mass and excluding the contributions of excited states. An analogous calculation of the nucleon axial charge governing beta decay has inconsistencies indicating a source of bias at low pion masses not present for the other observables and yields a result that disagrees with experiment. |
| doi_str_mv | 10.1016/j.physletb.2014.05.075 |
| format | Article |
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The key to this success is the combination of using a nearly physical pion mass and excluding the contributions of excited states. An analogous calculation of the nucleon axial charge governing beta decay has inconsistencies indicating a source of bias at low pion masses not present for the other observables and yields a result that disagrees with experiment.</description><identifier>ISSN: 0370-2693</identifier><identifier>EISSN: 1873-2445</identifier><identifier>DOI: 10.1016/j.physletb.2014.05.075</identifier><language>eng</language><publisher>United States: Elsevier B.V</publisher><subject>Charge ; Elementary particles ; Form factors ; Lattice QCD ; Lattices ; Mathematical analysis ; Nucleon structure ; Nucleons ; Pauli exclusion principle ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; Pions ; Quantum chromodynamics ; riken bnl research center</subject><ispartof>Physics Letters B, 2014-06, Vol.734, p.290-295</ispartof><rights>2014 The Authors</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c486t-def1440eb7ba3fc1aa7375ee02f28062157efb4f4c8d46acf61174b604f9b8ae3</citedby><cites>FETCH-LOGICAL-c486t-def1440eb7ba3fc1aa7375ee02f28062157efb4f4c8d46acf61174b604f9b8ae3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0370269314003852$$EHTML$$P50$$Gelsevier$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,860,881,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/1159692$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Green, J.R.</creatorcontrib><creatorcontrib>Engelhardt, M.</creatorcontrib><creatorcontrib>Krieg, S.</creatorcontrib><creatorcontrib>Negele, J.W.</creatorcontrib><creatorcontrib>Pochinsky, A.V.</creatorcontrib><creatorcontrib>Syritsyn, S.N.</creatorcontrib><creatorcontrib>Brookhaven National Laboratory (BNL) Riken BNL Research Center</creatorcontrib><title>Nucleon structure from Lattice QCD using a nearly physical pion mass</title><title>Physics Letters B</title><description>We report the first Lattice QCD calculation using the almost physical pion mass mπ=149 MeV that agrees with experiment for four fundamental isovector observables characterizing the gross structure of the nucleon: the Dirac and Pauli radii, the magnetic moment, and the quark momentum fraction. 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An analogous calculation of the nucleon axial charge governing beta decay has inconsistencies indicating a source of bias at low pion masses not present for the other observables and yields a result that disagrees with experiment.</description><subject>Charge</subject><subject>Elementary particles</subject><subject>Form factors</subject><subject>Lattice QCD</subject><subject>Lattices</subject><subject>Mathematical analysis</subject><subject>Nucleon structure</subject><subject>Nucleons</subject><subject>Pauli exclusion principle</subject><subject>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</subject><subject>Pions</subject><subject>Quantum chromodynamics</subject><subject>riken bnl research center</subject><issn>0370-2693</issn><issn>1873-2445</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqFkMtOwzAQRS0EEqXwC8hixSZhnPiR7kAtL6kCIcHactwxdZUmxXaQ-vckKqxZzebcOzOHkEsGOQMmbzb5br2PDaY6L4DxHEQOShyRCatUmRWci2MygVJBVshZeUrOYtwAABMgJ2Tx0tsGu5bGFHqb-oDUhW5LlyYlb5G-zRe0j779pIa2aEKzp-M2b01Dd37IbU2M5-TEmSbixe-cko-H-_f5U7Z8fXye3y0zyyuZshU6xjlgrWpTOsuMUaUSiFC4ogJZMKHQ1dxxW624NNZJxhSvJXA3qyuD5ZRcHXq7mLyO1ie0a9u1LdqkGRMzOSsG6PoA7UL31WNMeuujxaYxLXZ91EwqJiolhRpQeUBt6GIM6PQu-K0Je81Aj271Rv-51aNbDUIPbofg7SGIw7ffHsN4DLYWVz6Mt6w6_1_FDyY1hiI</recordid><startdate>20140627</startdate><enddate>20140627</enddate><creator>Green, J.R.</creator><creator>Engelhardt, M.</creator><creator>Krieg, S.</creator><creator>Negele, J.W.</creator><creator>Pochinsky, A.V.</creator><creator>Syritsyn, S.N.</creator><general>Elsevier B.V</general><scope>6I.</scope><scope>AAFTH</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20140627</creationdate><title>Nucleon structure from Lattice QCD using a nearly physical pion mass</title><author>Green, J.R. ; Engelhardt, M. ; Krieg, S. ; Negele, J.W. ; Pochinsky, A.V. ; Syritsyn, S.N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c486t-def1440eb7ba3fc1aa7375ee02f28062157efb4f4c8d46acf61174b604f9b8ae3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Charge</topic><topic>Elementary particles</topic><topic>Form factors</topic><topic>Lattice QCD</topic><topic>Lattices</topic><topic>Mathematical analysis</topic><topic>Nucleon structure</topic><topic>Nucleons</topic><topic>Pauli exclusion principle</topic><topic>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</topic><topic>Pions</topic><topic>Quantum chromodynamics</topic><topic>riken bnl research center</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Green, J.R.</creatorcontrib><creatorcontrib>Engelhardt, M.</creatorcontrib><creatorcontrib>Krieg, S.</creatorcontrib><creatorcontrib>Negele, J.W.</creatorcontrib><creatorcontrib>Pochinsky, A.V.</creatorcontrib><creatorcontrib>Syritsyn, S.N.</creatorcontrib><creatorcontrib>Brookhaven National Laboratory (BNL) Riken BNL Research Center</creatorcontrib><collection>ScienceDirect Open Access Titles</collection><collection>Elsevier:ScienceDirect:Open Access</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Physics Letters B</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Green, J.R.</au><au>Engelhardt, M.</au><au>Krieg, S.</au><au>Negele, J.W.</au><au>Pochinsky, A.V.</au><au>Syritsyn, S.N.</au><aucorp>Brookhaven National Laboratory (BNL) Riken BNL Research Center</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nucleon structure from Lattice QCD using a nearly physical pion mass</atitle><jtitle>Physics Letters B</jtitle><date>2014-06-27</date><risdate>2014</risdate><volume>734</volume><spage>290</spage><epage>295</epage><pages>290-295</pages><issn>0370-2693</issn><eissn>1873-2445</eissn><abstract>We report the first Lattice QCD calculation using the almost physical pion mass mπ=149 MeV that agrees with experiment for four fundamental isovector observables characterizing the gross structure of the nucleon: the Dirac and Pauli radii, the magnetic moment, and the quark momentum fraction. 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| source | DOAJ Directory of Open Access Journals; Elsevier ScienceDirect Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Charge Elementary particles Form factors Lattice QCD Lattices Mathematical analysis Nucleon structure Nucleons Pauli exclusion principle PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Pions Quantum chromodynamics riken bnl research center |
| title | Nucleon structure from Lattice QCD using a nearly physical pion mass |
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