Nucleon Matrix Elements of the Antisymmetric Quark Tensor
Nov 27, 2018
7 pages
Published in:
- Phys.Rev.Lett. 122 (2019) 12, 122001,
- Phys.Rev.Lett. 124 (2020) 19, 199901 (erratum)
- Published: Mar 30, 2019
e-Print:
- 1811.11181 [hep-ph]
DOI:
Report number:
- INT-PUB-18-057
View in:
Citations per year
Abstract: (APS)
If physics beyond the standard model enters well above the electroweak scale, its low-energy effects are described by standard model effective field theory. Already, at dimension 6, many operators involve the antisymmetric quark tensor q¯σμνq, whose matrix elements are difficult to constrain from experiment, Ward identities, or low-energy theorems, in contrast to the corresponding vector and axial-vector or even scalar and pseudoscalar currents. However, with normalizations determined from lattice QCD, analyticity and unitarity often allow one to predict the momentum dependence in a large kinematic range. Starting from recent results in the meson sector, we extend this method to the nucleon case and, in combination with pole dominance, provide a comprehensive assessment of the current status of the nucleon form factors of the quark tensor.Note:
- 7 pages, 3 figures; strangeness input updated
- Elementary Particles and Fields
- nucleon: form factor: tensor
- standard model
- effective field theory
- quark: current
- current: tensor
- quark: operator
- operator: dimension: 6
- quantum chromodynamics: lattice
References(113)
Figures(3)
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- [3]
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- [6]
- [7]
- [8]
- [9]
- [10]
- [11]
- [12]
- [12]
- [13]
- [14]
- [15]
- [16]
- [17]
- [18]
- [19]
- [20]
- [21]
- [22]
- [23]
- [24]