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Proceedings of the 24th International Spin Symposium (SPIN2021)最新文献

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The String+3P0 Model of Hadronization 强子化的弦+3P0模型
Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-01-14 DOI: 10.7566/JPSCP.37.020101
X. Artru, A. Kerbizi
{"title":"The String+3P0 Model of Hadronization","authors":"X. Artru, A. Kerbizi","doi":"10.7566/JPSCP.37.020101","DOIUrl":"https://doi.org/10.7566/JPSCP.37.020101","url":null,"abstract":"We present the main theoretical aspects of the quantum mechanical string + 3 P 0 model of polarized quark fragmentation for pseudoscalar and vector meson production. The model is an extension of the Lund string fragmentation model that systematically includes the quark spin degree of freedom assuming the 3 P 0 mechanism of quark pair production at string breaking. The recently achieved introduction of vector mesons accounts for the spin correlations between the latter and the quark of the fragmentation chain. The string + 3 P 0 model reproduces transverse spin e ff ects such as the Collins e ff ect and the dihadron asymmetry, and longitudinal spin e ff ects such as the jet handedness.","PeriodicalId":134433,"journal":{"name":"Proceedings of the 24th International Spin Symposium (SPIN2021)","volume":"432 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116006339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
TMDs for Spin-1 Hadrons 自旋-1强子的tmd
Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-01-14 DOI: 10.7566/JPSCP.37.020130
S. Kumano, Qin-Tao Song
{"title":"TMDs for Spin-1 Hadrons","authors":"S. Kumano, Qin-Tao Song","doi":"10.7566/JPSCP.37.020130","DOIUrl":"https://doi.org/10.7566/JPSCP.37.020130","url":null,"abstract":",","PeriodicalId":134433,"journal":{"name":"Proceedings of the 24th International Spin Symposium (SPIN2021)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125433709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Azimuthal Asymmetries in Unpolarised Semi-Inclusive DIS at COMPASS 罗盘非极化半包容DIS中的方位不对称性
Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-01-13 DOI: 10.7566/JPSCP.37.020104
J. Matoušek
{"title":"Azimuthal Asymmetries in Unpolarised Semi-Inclusive DIS at COMPASS","authors":"J. Matoušek","doi":"10.7566/JPSCP.37.020104","DOIUrl":"https://doi.org/10.7566/JPSCP.37.020104","url":null,"abstract":"In semi-inclusive deep inelastic scattering (SIDIS) the non-zero transverse momentum of partons induces azimuthal dependence of the cross-section. For unpolarised nucleon, three azimuthal modulations that can be related to different combinations of twist-two or higher twist transverse momentum dependent PDFs and fragmentation functions arise: the so-called Cahn effect reflected in $cosphi_mathrm{h}$ modulation, the $cos2phi_mathrm{h}$ term related to the Boer--Mulders PDF and $sinphi_mathrm{h}$ twist-three effect known as beam-spin asymmetry. In 2016 and 2017, the COMPASS experiment at CERN collected a large sample of SIDIS events using a longitudinally polarised 160~GeV/$c$ muon beam scattering on a liquid hydrogen target. Amplitudes of the aforementioned azimuthal modulations have been extracted from part of the data. A new procedure has been developed to subtract a background coming from the decay of diffractively produced vector mesons. The results presented in this talk qualitatively agree with earlier COMPASS results obtained with an isoscalar target.","PeriodicalId":134433,"journal":{"name":"Proceedings of the 24th International Spin Symposium (SPIN2021)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130813303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spin Asymmetries in Electron-jet Production at the EIC EIC中电子射流产生的自旋不对称性
Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-01-12 DOI: 10.7566/JPSCP.37.020128
Z. Kang, Kyle Lee, D. Shao, Fanyi Zhao
{"title":"Spin Asymmetries in Electron-jet Production at the EIC","authors":"Z. Kang, Kyle Lee, D. Shao, Fanyi Zhao","doi":"10.7566/JPSCP.37.020128","DOIUrl":"https://doi.org/10.7566/JPSCP.37.020128","url":null,"abstract":"We investigate all the possible spin asymmetries that can occur in back-to-back electron-jet production with hadron observed inside a jet in electron-proton collisions. We derive the factorization formalism for all spin asymmetries and perform phenomenological studies for the future electron ion collider kinematics. We illustrate that the back-to-back electron-jet production opens up new oppor-tunities to study transverse momentum dependent fragmentation functions and distribution functions","PeriodicalId":134433,"journal":{"name":"Proceedings of the 24th International Spin Symposium (SPIN2021)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116194535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Hadron Spin Structure from Lattice QCD 晶格QCD的强子自旋结构
Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2021-12-16 DOI: 10.7566/JPSCP.37.011013
C. Alexandrou
{"title":"Hadron Spin Structure from Lattice QCD","authors":"C. Alexandrou","doi":"10.7566/JPSCP.37.011013","DOIUrl":"https://doi.org/10.7566/JPSCP.37.011013","url":null,"abstract":"We present results on the spin carried by quarks and gluons in the nucleon using lattice QCD simulations with physical values of the light, strange and charm quark masses. We also discuss selective results on the x-dependence of parton distribution functions computed in lattice QCD employing the quasi-parton distribution approach and the large momentum effective theory.","PeriodicalId":134433,"journal":{"name":"Proceedings of the 24th International Spin Symposium (SPIN2021)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134020970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Weinberg Operator Contribution to the Hadronic CP Violation Weinberg算符对强子CP破坏的贡献
Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2021-12-13 DOI: 10.7566/JPSCP.37.020607
N. Yamanaka
{"title":"Weinberg Operator Contribution to the Hadronic CP Violation","authors":"N. Yamanaka","doi":"10.7566/JPSCP.37.020607","DOIUrl":"https://doi.org/10.7566/JPSCP.37.020607","url":null,"abstract":"The CP violating Weinberg operator (or the gluon chromo-electric dipole moment) is generated in many candidates of new physics beyond the standard model, and it contributes to observables such as the electric dipole moments (EDM) of the neutron, nuclei and atoms. In this proceedings contribution, we review the present understanding of the Weinberg operator as well as the result of the estimation of its e ff ect to the EDM of 3 He nucleus through the contact CP-odd nuclear force.","PeriodicalId":134433,"journal":{"name":"Proceedings of the 24th International Spin Symposium (SPIN2021)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114749397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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