Nucleon scalar and tensor charges using lattice QCD simulations at the physical value of the pion mass

Autor: Alexandrou, Constantia, Constantinou, Martha, Dimopoulos, Petros, Frezzotti, R., Hadjiyiannakou, Kyriakos, Jansen, K., Kallidonis, Christos, Kostrzewa, B., Koutsou, Giannis, Mangin-Brinet, M., Vaquero Avilès-Casco, A., Wenger, U.
Přispěvatelé: Alexandrou, Constantia [0000-0001-9136-3621], Kallidonis, Christos [0000-0002-7734-0789], Dimopoulos, Petros [0000-0002-8660-714X], Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire de Physique Subatomique et de Cosmologie ( LPSC ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut polytechnique de Grenoble - Grenoble Institute of Technology ( Grenoble INP ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA )
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Nuclear Theory
Isoscalar
01 natural sciences
12.38.Aw
High Energy Physics - Phenomenology (hep-ph)
excited state
nucleon: charm
ground state
[ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex]
Nuclear Experiment (nucl-ex)
renormalization: nonperturbative
quark: mass dependence
Nuclear Experiment
[ PHYS.NUCL ] Physics [physics]/Nuclear Theory [nucl-th]
Quantum chromodynamics
Physics
charge: scalar
High Energy Physics - Lattice (hep-lat)
12.38.-t
lattice field theory
[ PHYS.HLAT ] Physics [physics]/High Energy Physics - Lattice [hep-lat]
Lattice QCD
Settore FIS/02 - Fisica Teorica
Modelli e Metodi Matematici

error: statistical
High Energy Physics - Phenomenology
Quantum electrodynamics
Nucleon
quark: Wilson
Particle physics
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]
530 Physics
Lattice field theory
isovector
FOS: Physical sciences
nucleon: charge
12.38.Gc
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
fermion: clover
Nuclear Theory (nucl-th)
High Energy Physics - Lattice
isoscalar
quark: flavor: 2
0103 physical sciences
quantum chromodynamics
nucleon: strangeness
ddc:530
Tensor
010306 general physics
numerical calculations
Isovector
010308 nuclear & particles physics
[PHYS.HLAT]Physics [physics]/High Energy Physics - Lattice [hep-lat]
Scalar (physics)
quark: mass: twist
14.70.Dj
[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
11.15.Ha
[ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
charge: tensor
Zdroj: Physical review / D 95(11), 114514 (2017). doi:10.1103/PhysRevD.95.114514
Physical Review D
Phy.Rev.D
Phys.Rev.D
Phys.Rev.D, 2017, 95 (11), pp.114514. ⟨10.1103/PhysRevD.95.114514⟩
Physical Review D, American Physical Society, 2017, 95 (11), pp.114514. ⟨10.1103/PhysRevD.95.114514⟩
Phys.Rev.D, 2017, 95 (11), pp.114514. 〈10.1103/PhysRevD.95.114514〉
ISSN: 1550-7998
1550-2368
DOI: 10.1103/PhysRevD.95.114514
Popis: Physical review / D 95(11), 114514(2017). doi:10.1103/PhysRevD.95.114514
We present results on the light, strange and charm nucleon scalar and tensor charges from lattice QCD, using simulations with $N_f$ = 2 flavors of twisted mass clover-improved fermions with a physical value of the pion mass. Both connected and disconnected contributions are included, enabling us to extract the isoscalar, strange and charm charges for the first time directly at the physical point. Furthermore, the renormalization is computed nonperturbatively for both isovector and isoscalar quantities. We investigate excited state effects by analyzing several sink-source time separations and by employing a set of methods to probe ground state dominance. Our final results for the scalar charges are $g^{u}_{S} =$ 5.20(42)(15)(12), $g^{d}_{S} =$ 4.27(26)(15)(12), $g^{s}_{S} =$ 0.33(7)(1)(4), and $g^{c}_{S} =$ 0.062(13)(3)(5) and for the tensor charges $g^{c}_{T} =$ 0.794(16)(2)(13), $g^{d}_{T} =$ −0.210(10)(2)(13), $g^{s}_{T} =$ 0.00032(24)(0), and $g^{c}_{T} =$ 0.00062(85)(0) in the $\overline{MS}$ scheme at 2 GeV. The first error is statistical, the second is the systematic error due to the renormalization and the third the systematic arising from estimating the contamination due to the excited states, when our data are precise enough to probe the first excited state.
Published by APS, Woodbury, NY
Databáze: OpenAIRE