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Improved measurement of the longitudinal spin transfer to Λ and  ̄Λ hyperons in polarized proton-proton collisions at √s=200??GeV
http://hdl.handle.net/2241/00157715
http://hdl.handle.net/2241/0015771551d14752-fbad-4948-b5ca-b1cd485684dd
名前 / ファイル | ライセンス | アクション |
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PRD_98-11-112009 (1.7 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2019-09-26 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Improved measurement of the longitudinal spin transfer to Λ and  ̄Λ hyperons in polarized proton-proton collisions at √s=200??GeV | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
著者 |
江角, 晋一
× 江角, 晋一× STA Collaboration |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The longitudinal spin transfer DLL to Λ and  ̄Λ hyperons produced in high-energy polarized proton-proton collisions is expected to be sensitive to the helicity distribution functions of strange quarks and antiquarks of the proton, and to longitudinally polarized fragmentation functions. We report an improved measurement of DLL from data obtained at a center-of-mass energy of √s=200??GeV with the STAR detector at RHIC. The data have an approximately twelve times larger figure of merit than prior results and cover |η|<1.2 in pseudorapidity with transverse momenta pT up to 6??GeV/c. In the forward scattering hemisphere at largest pT, the longitudinal spin transfer is found to be DLL=?0.036±0.048(stat)±0.013(sys) for Λ hyperons and DLL=0.032±0.043(stat)±0.013(sys) for  ̄Λ antihyperons. The dependences on η and pT are presented and compared with model evaluations. | |||||
言語 | en | |||||
書誌情報 |
en : Physical review D 巻 98, 号 11, p. 112009, 発行日 2018-12 |
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ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 2470-0010 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00773624 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1103/PhysRevD.98.112009 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | American Physical Society |