Proceedings of the 24th International Spin Symposium (SPIN2021)最新文献_第8页

Theory of Muon g-2 介子g-2理论

Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-06-12 DOI: 10.7566/JPSCP.37.011003

B. Malaescu

引用次数: 0

Polarized Electron Beams from Laser Plasma Acceleration and Their Polarimetry 激光等离子体加速产生的极化电子束及其偏振测量

Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-04-27 DOI: 10.7566/JPSCP.37.021104

Jennifer Popp, S. Bohlen, F. Stehr, J. List, G. Moortgat-pick, J. Osterhoff, K. Põder

引用次数: 0

Time-like Gravitational Formfactors and Shear Viscosity 类时引力形因子与剪切粘度

Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-04-20 DOI: 10.7566/JPSCP.37.020406

O. Teryaev

引用次数: 0

Extracting the (Lambda ) Polarizing Fragmentation Function from Belle e+e− Data within the TMD Formalism TMD形式下Belle e+e−数据的(Lambda )极化碎片函数提取

Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-03-25 DOI: 10.7566/JPSCP.37.020111

M. Zaccheddu, U. D’Alesio, L. Gamberg, F. Murgia

引用次数: 0

Spin Effects in Heavy Ion Collisions at High Energies 高能重离子碰撞中的自旋效应

Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-03-18 DOI: 10.7566/JPSCP.37.011005

Z. Liang

{"title":"Spin Effects in Heavy Ion Collisions at High Energies","authors":"Z. Liang","doi":"10.7566/JPSCP.37.011005","DOIUrl":"https://doi.org/10.7566/JPSCP.37.011005","url":null,"abstract":"In non-central high energy heavy ion collisions, the colliding system possesses a huge orbital angular momentum along the normal direction of the reaction plane. Due to the spin orbit interaction in the system, such a huge orbital angular momentum leads to the spin polarization of quarks and anti-quarks in the quark matter system produced in the collision. Such an e ﬀ ect, known as the global polarization e ﬀ ect, was predicted many years ago and has been conﬁrmed by the STAR collaboration at RHIC. The discovery of the global polarization e ﬀ ect opens a new avenue in heavy ion physics in general and in studying the properties of quark-gluon plasma in particular. This talk will brieﬂy review the original ideas and calculations that lead to the prediction and summarize progresses and problems in related aspects. + e − annihilations. The result shows that, in contrast to quark combination, ρ 00 obtained in fragmentation is larger than 1 / 3. This implies that the spin of ¯ q produced in the Among the most aspects, we particular: (i) GPE phenomenology including experimental and di ﬀ erent phenomenological approaches; (ii) Spin-vortical e ﬀ ects in strong interacting system; (iii) Spin-magnetic e ﬀ ects in HIC including (a) the ﬁne structure of GPE of di ﬀ erent hadrons, (b) chiral magnetic e ﬀ ect and (c) spin-electromagnetic e ﬀ ects in ultra-peripheral collisions (UPC) in HIC; and (iv) Spin transport theory in relativistic quantum system to derive GPE, describe the spin transport, calculate the polarization and other related spin e ﬀ ects directly from QCD.","PeriodicalId":134433,"journal":{"name":"Proceedings of the 24th International Spin Symposium (SPIN2021)","volume":"17 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133481308","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

Nuclear Modified Transverse Momentum Distributions and 3D Imaging in Nuclei 核修正横向动量分布和核三维成像

Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-03-17 DOI: 10.7566/JPSCP.37.020126

M. Alrashed, D. Anderle, Z. Kang, John R. Terry, H. Xing

引用次数: 0

Gluon TMDs and Inelastic (J/psi ) Leptoproduction at the EIC 胶子tmd和非弹性(J/psi ) Leptoproduction在EIC

Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-03-07 DOI: 10.7566/JPSCP.37.020127

U. D’Alesio, A. Mukherjee, F. Murgia, C. Pisano, S. Rajesh

引用次数: 0

Exploring the Quark Transversity and the Collins Fragmentation Functions Using Polarized pp Collisions at STAR 利用星上偏振pp碰撞探索夸克横向和Collins碎片函数

Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-03-01 DOI: 10.7566/JPSCP.37.020118

T. Lin

{"title":"Exploring the Quark Transversity and the Collins Fragmentation Functions Using Polarized pp Collisions at STAR","authors":"T. Lin","doi":"10.7566/JPSCP.37.020118","DOIUrl":"https://doi.org/10.7566/JPSCP.37.020118","url":null,"abstract":"Understanding the internal spin structure of the nucleon still remains a challenge in strong interac-tion physics. Transversity, which describes the transverse spin structure of quarks in a transversely polarized proton, is poorly constrained by experimental data. Since it is chiral-odd, it can only be ac-cessed through channels that couple to other chiral-odd distributions, like the Collins fragmentation functions (so-called Collins e ﬀ ect) or the interference fragmentation functions. Recently, a detailed calculation using the soft-collinear e ﬀ ective theory found that the Collins e ﬀ ect in pp collisions involves a mixture of collinear and transverse momentum dependent (TMD) factorization. The Collins e ﬀ ect provides a direct probe to the Collins fragmentation function and enables testing of its evolution, universality and factorization breaking in the transverse momentum dependent formalism. In 2018, STAR published the ﬁrst measurements of Collins asymmetries for charged pions in jets in polarized pp collisions at √ s = 500 GeV based on data taken during 2011. These measurements probe Q 2 scales one to two orders of magnitude larger than similar measurements in semi-inclusive deep-inelastic scattering (SIDIS) and the results are consistent with predictions based on global analyses of e + e − and SIDIS data. In 2012 and 2015, STAR collected ∼ 14 pb − 1 and ∼ 52 pb − 1 of transversely polarized pp data at √ s = 200 GeV, respectively. These datasets provide the most precise measurement of the Collins e ﬀ ect in 200 GeV pp collisions to date, especially at the quark momentum fractions 0 . 1 ≤ x ≤ 0 . 4. These proceedings present the preliminary results for Collins asymmetries of identiﬁed pions in jets in pp collisions at √ s = 200 GeV and comparisons to theory predictions.","PeriodicalId":134433,"journal":{"name":"Proceedings of the 24th International Spin Symposium (SPIN2021)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114405010","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

General Helicity Formalism for Two-hadron Production in e+e− Collisions and the (Lambda ) Polarizing Fragmentation Function e+e−碰撞中双强子产生的一般螺旋形及(Lambda )极化破碎函数

Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-02-21 DOI: 10.7566/JPSCP.37.020112

U. D’Alesio, F. Murgia, M. Zaccheddu

引用次数: 0

Interplay of Beam Polarisation and Systematic Uncertainties in Electroweak Precision Measurements at Future e+e− Colliders 未来e+e−对撞机电弱精度测量中光束偏振与系统不确定度的相互作用

Proceedings of the 24th International Spin Symposium (SPIN2021) Pub Date : 2022-02-15 DOI: 10.7566/JPSCP.37.020502

J. Beyer, J. List

{"title":"Interplay of Beam Polarisation and Systematic Uncertainties in Electroweak Precision Measurements at Future e+e− Colliders","authors":"J. Beyer, J. List","doi":"10.7566/JPSCP.37.020502","DOIUrl":"https://doi.org/10.7566/JPSCP.37.020502","url":null,"abstract":"Future high-energy $textrm{e}^+textrm{e}^-$ colliders will provide some of the most precise tests of the Standard Model. Statistical uncertainties on electroweak precision observables and triple gauge couplings are expected to improve by orders of magnitude over current measurements. This provides a new challenge in accurately assessing and minimizing the impact of experimental systematic uncertainties. Beam polarization may hold a unique potential to isolate and determine the size of systematic effects. So far, studies have mainly focused on the statistical improvements from beam polarisation. This study aims to assess, for the first time, its impact on systematic uncertainties. A combined fit of precision observables, such as chiral fermion couplings and anomalous triple gauge couplings, together with experimental systematic effects is performed on generator-level differential distribution of 2-fermion and 4-fermion final-states. Different configurations of available beam polarisations and luminosities are tested with and without systematic effects, and will be discussed in the context of the existing projections on fermion and gauge boson couplings from detailed experimental simulations.","PeriodicalId":134433,"journal":{"name":"Proceedings of the 24th International Spin Symposium (SPIN2021)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128539067","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