Laboratory search for spin-dependent short-range force from axionlike particles using optically polarized<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>He</mml:mi><mml:mprescripts /><mml:none /><mml:mn>3</mml:mn></mml:mmultiscripts></mml:math>gas

Chu, Pinghan; Dennis, A.; Fu, Changbo; H, Gao; Khatiwada, R.; Laskaris, G.; Li, K.; Smith, E.; Snow, W. M.; Yan, Huan; Zheng, W.

doi:10.1103/physrevd.87.011105

Cited by 58 publications

(30 citation statements)

References 28 publications

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“…Measurements of 3 He transverse relaxation rate as a function of parameters such as bias magnetic field, density, and mass distribution then potentially reveal the existence of the scalar-pseudoscalar coupling. A series of experiments have been done along these lines (Chu et al , 2013; Fu et al , 2011; Guigue et al , 2015; Yan et al , 2015). At the shortest distances Λ < 20 μ m, this method is the most sensitive (Guigue et al , 2015); for Λ > 50 μ m the 3 He-Xe comagnetometry prevails (Tullney et al , 2013); the small intermediate regime is limited by a dual isotope Xe comagnetometer (Bulatowicz et al , 2013).…”

Section: Precision Measurementsmentioning

confidence: 99%

Optically polarizedHe3

et al. 2017

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This article reviews the physics and technology of producing large quantities of highly spin-polarized 3He nuclei using spin-exchange (SEOP) and metastability-exchange (MEOP) optical pumping. Both technical developments and deeper understanding of the physical processes involved have led to substantial improvements in the capabilities of both methods. For SEOP, the use of spectrally narrowed lasers and K-Rb mixtures has substantially increased the achievable polarization and polarizing rate. For MEOP nearly lossless compression allows for rapid production of polarized 3He and operation in high magnetic fields has likewise significantly increased the pressure at which this method can be performed, and revealed new phenomena. Both methods have benefitted from development of storage methods that allow for spin-relaxation times of hundreds of hours, and specialized precision methods for polarimetry. SEOP and MEOP are now widely applied for spin-polarized targets, neutron spin filters, magnetic resonance imaging, and precision measurements.

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Section: Precision Measurementsmentioning

confidence: 99%

Optically polarizedHe3

et al. 2017

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“…Note that because of these reconsiderations of the nuclear spin content, the updated parameter exclusion plot shown in figure 1 is significantly different from the parameter exclusion plot published as figure 1 in [7]. While in this section we have focused our attention on the case of long-range monopole-dipole interactions, we note that there are also a number of experiments that search for short-range monopole-dipole interactions using a variety of experimental methods: for example, the study of spin-relaxation of polarized 3 He [75], nuclear magnetic resonance studies with 129 Xe and 131 Xe [9] and 3 He [76], and measurements of ultracold neutrons [77,78]. None of the constraints listed are affected by our analysis, since they either used neutrons directly or reliable shell-model calculations for their estimates of nuclear spin content.…”

Section: Exotic Long-range Monopole-dipole Couplingsmentioning

confidence: 99%

Nuclear spin content and constraints on exotic spin-dependent couplings

Kimball

2015

New J. Phys.

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There are numerous recent and ongoing experiments employing a variety of atomic species to search for couplings of atomic spins to exotic fields. In order to meaningfully compare these experimental results, the coupling of the exotic field to the atomic spin must be interpreted in terms of the coupling to electron, proton, and neutron spins. Traditionally, constraints from atomic experiments on exotic couplings to neutron and proton spins have been derived using the single-particle Schmidt model for nuclear spin. In this model, particular atomic species are sensitive to either neutron or proton spin couplings, but not both. More recently, semi-empirical models employing nuclear magnetic moment data have been used to derive new constraints for non-valence nucleons. However, comparison of such semi-empirical models to detailed large-scale nuclear shell model calculations and analysis of known physical effects in nuclei show that existing semi-empirical models cannot reliably be used to predict the spin polarization of non-valence nucleons. The results of our re-analysis of nuclear spin content are applied to searches for exotic long-range monopole-dipole and dipole-dipole couplings of nuclei leading to significant revisions of some published constraints. OPEN ACCESS RECEIVED

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“…Recent experimental advances such as the availability of polarized beams and hyperpolarized 3 He targets have allowed for the extraction of spin-dependent neutron structure properties such as the electromagnetic form factors [1][2][3][4][5][6][7] and the spin structure functions [8][9][10][11][12]. Hyperpolarized 3 He targets have also been used in the search for a new spin-dependent force between polarized neutrons and unpolarized nucleons [13]. An important uncertainty in extracting the neutron information from 3 He is due to the nuclear corrections, which can only be improved by testing theoretical calculations of three-body systems by experiments such as polarized photodisintegration of 3 He.…”

Section: Introductionmentioning

confidence: 99%

Spin-dependent cross sections from the three-body photodisintegration ofHe3at incident energies of 12.8 and 14.7 MeV

Laskaris¹,

Ye²,

Lalremruata³

et al. 2014

Phys. Rev. C

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The first measurement of the three-body photodisintegration of polarized 3 He using a circularly polarized photon beam has been performed at incident energies of 12.8 and 14.7 MeV. This measurement was carried out at the high-intensity γ -ray source located at Triangle Universities Nuclear Laboratory. A high-pressure 3 He target, polarized via spin exchange optical pumping with alkali metals, was used in the experiment. The spin-dependent double-and single-differential cross sections from 3 He( γ ,n)pp for laboratory angles varying from 30 • to 165 • are presented and compared with state-of-the-art three-body calculations. The data reveal the importance of including the Coulomb interaction between protons in the three-body calculations.Alt, Grassberger, and Sandhas (AGS) [15] equations. The calculations by Deltuva et al. [16] are based on the AGS equations and employ the coupled-channel extension of the charge-dependent Bonn (CD Bonn) nucleon-nucleon (NN) potential [17][18][19], including explicit excitation of a nucleon into a -isobar, called CD Bonn + -isobar [20]. In the three-nucleon (3N ) system the -isobar excitation yields effective 3N force and effective two-nucleon and 3N currents that are mutually consistent [16]. In addition to single-baryon and meson exchange electromagnetic currents, the relativistic single-nucleon charge corrections (RC) are taken into account [16]. The proton-proton Coulomb interaction is also included using the method of screening and renormalization [21]. The calculations by Skibiński et al. solve the Faddeev equations by using the Argonne V18 (AV18) NN potential [22] and the Urbana IX (UIX) 3N force [23], taking into account the single-nucleon currents and the two most important meson exchange currents, namely the seagull and pion-in-flight terms [24].In addition, Rozpȩdzik and collaborators [25] have carried out calculations of the three-body photodisintegration of 3 He using chiral effective field theory [26] (χ EFT) in the Faddeev framework including the well-known one-pion exchange contributions and the long-range two-pion exchange parts of meson exchange currents at next-to-leading-order derived with the method of unitary transformation [27]. The results are compared with the calculations obtained with the AV18 NN potential and the related exchange currents, and good agreement is found between the two theories [25]. However, the uncertainties of χ EFT are much larger compared

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Laboratory search for spin-dependent short-range force from axionlike particles using optically polarizedHe3gas

Cited by 58 publications

References 28 publications

Optically polarizedHe3

Optically polarizedHe3

Nuclear spin content and constraints on exotic spin-dependent couplings

Spin-dependent cross sections from the three-body photodisintegration ofHe3at incident energies of 12.8 and 14.7 MeV

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