Deuteron photodisintegration by polarized photons in the region of the $d^*(2380)$
M. Bashkanov, S. Kay, D. P. Watts, C. Mullen, S. Abt, P. Achenbach, P. Adlarson, F. Afzal, Z. Ahmed, C. S. Akondi, J. R. M. Annand, H. J. Arends, R. Beck, M. Bi… 展开作者
M. Bashkanov, S. Kay, D. P. Watts, C. Mullen, S. Abt, P. Achenbach, P. Adlarson, F. Afzal, Z. Ahmed, C. S. Akondi, J. R. M. Annand, H. J. Arends, R. Beck, M. Biroth, N. Borisov, A. Braghieri, W. J. Briscoe, F. Cividini, C. Collicott, S. Costanza, A. Denig, E. J. Downie, P. Drexler, S. Garni, D. I. Glazier, I. Gorodnov, W. Gradl, M. Günther, D. Gurevich, L. Heijkenskjöld, D. Hornidge, G. M. Huber, A. Käser, V. L. Kashevarov, M. Korolija, B. Krusche, A. Lazarev, K. Livingston, S. Lutterer, I. J. D. MacGregor, R. Macrae, D. M. Manley, P. P. Martel, R. Miskimen, E. Mornacchi, A. Neganov, A. Neiser, M. Ostrick, P. B. Otte, D. Paudyal, P. Pedroni, A. Powell, S. N. Prakhov, G. Ron, T. Rostomyan, A. Sarty, C. Sfienti, V. Sokhoyan, K. Spieker, O. Steffen, I. I. Strakovsky, T. Strub, I. Supek, A. Thiel, M. Thiel, A. Thomas, Yu. A. Usov, S. Wagner, N. K. Walford, D. Werthmüller, J. Wettig, M. Wolfes, L. A. Zana
We report the first large-acceptance measurement of the beam-spin asymmetry for deuteron photodisintegration ($\vecγ d\to pn$) in the photon energy range $400<E_γ<630$~MeV. The measurement provides important new constraints on the mechanisms of photodisintegration above the delta resonance and on the photocoupling of the recently discovered $d^*(2380)$ hexaquark.
A measurement of the differential cross section for the two-body photodisintegration of 3He at theta_LAB = 90deg using tagged photons in the energy range 14 -- 31 MeV
Investigation of cluster structure of light nuclei H, He and Li isotopes, in three-body final states photodisintegration processes in the energy range 50-250 MeV using photon beams of Yerevan Synchrotron
Spatial imaging of polarized deuterons at the Electron-Ion Collider
University of Jyväskylä(于韦斯屈莱大学);Helsinki Institute of Physics(赫尔辛基物理研究所);Institute for Nuclear Theory, University of Washington(华盛顿大学核理论研究所);Brookhaven National Laboratory(布鲁克海文国家实验室);Wayne State University(韦恩州立大学);RIKEN BNL Research Center(理研布鲁克海文研究中心);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);University of California, Berkeley(加州大学伯克利分校)
Tensor-polarized parton distribution functions of the deuteron by a convolution model
Quark Matter Research Center, Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所夸克物质研究中心);Southern Center for Nuclear Science Theory, Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所南方核科学理论中心);KEK Theory Center, Institute of Particle and Nuclear Studies, KEK(高能加速器研究机构粒子与核研究所学部KEK理论中心)
Potential for measurement of the tensor electric and magnetic polarizabilities of the deuteron in storage-ring experiments with polarized beams
测量氘核的张量极化率和张量极化率是非常有意义的,特别是与COSY和GSI的可能性有关。这些极化率可以通过提供g-2旋进消失的冻结自旋方法在储存环中测量。该方法将用于计划中的储存环氘电偶极矩实验。在上述实验中,氘核的张量极化率显著影响垂直极化的建立。自旋相互作用依赖于电偶极矩,张量极化率,和场失调引起的主要系统误差具有非常不同的对称性。对于所考虑的实验条件,$1\times10^{-29} e\cdot$ cm对氘EDM的灵敏度对应于以$δα_T\approxδβ_T\approx5\times10^{-42}$ cm $^3$的精度测量两个张量极化率。这种保守估计可以通过排除由场不稳定性引起的系统误差来改善,因为场不稳定性对于张量极化率的测量是可以忽略的。为了得到张量磁极化率,需要测量极化矢量的水平分量。
Tensor-polarized structure functions: Tensor structure of deuteron in 2020's
我们解释了自旋为1的强子的自旋结构,其中有新的结构函数,除了那些($F_1$,$F_2$,$g_1$,$g_2$)存在于自旋为1/2的核子,与它的张量结构。在带电轻子与自旋为1的强子(如氘核)的深度非弹性散射中,新的结构函数是$b_1$、$b_2$、$b_3$和$b_4$。其中,扭二函数在Bjorken标度极限下由Callan-Gross型关系$b_2 = 2 x b_1$联系起来。首先,引入了这些新的结构函数,并导出了从强子张量$W_{μν}$到$b_{1-4}$的投影算符的实用公式。其次,一个总和规则解释为$b_1$,并可能张量极化分布进行了讨论,通过使用HERMES数据,以提出未来的实验测量,并将它们与理论模型进行比较。一项在托马斯·杰斐逊国家加速器设施(JLab)测量$b_1$的提案获得批准,因此预计在不久的将来$b_1$将取得很大进展。第三,极化质子-氘核Drell-Yan过程的形式主义被解释为探测特别是张量极化反夸克分布,这是由HERMES数据建议。张量极化结构函数的研究将在2020年代为用夸克和胶子自由度研究张量结构开辟一个新的纪元,这与通常用核子和介子描述张量结构有很大不同。
Tensor-polarized twist-3 distribution function $f_{LT}$ of spin-1 deuteron
Quark Matter Research Center, Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所夸克物质研究中心);Southern Center for Nuclear Science Theory, Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所南方核科学理论中心);KEK Theory Center, Institute of Particle and Nuclear Studies, KEK(高能加速器研究机构粒子与核研究所学部理论中心)
Tensor-polarized parton distribution functions for spin-1 hadrons
Quark Matter Research Center, Institute of Modern Physics, Chinese Academy of Sciences(夸克物质研究中心,现代物理研究所,中国科学院);Southern Center for Nuclear Science Theory, Institute of Modern Physics, Chinese Academy of Sciences(南方核科学理论中心,现代物理研究所,中国科学院);KEK Theory Center, Institute of Particle and Nuclear Studies, KEK(KEK理论中心,粒子与核研究研究所,KEK)
Tensor-polarized twist-3 parton distribution functions $f_{LT}(x)$ for the spin-1 deuteron by using twist-2 relations
Quark Matter Research Center, Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所夸克物质研究中心);Southern Center for Nuclear Science Theory, Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所南方核科学理论中心);KEK Theory Center, Institute of Particle and Nuclear Studies, KEK(高能加速器研究机构粒子与核研究部KEK理论中心)