Measurement of the 3He spin-structure functions and of neutron (3He) spin-dependent sum rules at 0.035 ≤ Q2 ≤ 0.24 GeV2

Jefferson Lab E97-110 Collaboration

doi:10.1016/j.physletb.2020.135428

Measurement of the ³He spin-structure functions and of neutron (³He) spin-dependent sum rules at 0.035 ≤ Q² ≤ 0.24 GeV²

Jefferson Lab E97-110 Collaboration

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

The spin-structure functions g₁ and g₂, and the spin-dependent partial cross-section σ_TT have been extracted from the polarized cross-sections differences, Δσ_∥(ν,Q²) and Δσ_⊥(ν,Q²) measured for the He3→(e→,e^′)X reaction, in the E97-110 experiment at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of 6^∘ and 9^∘ from a longitudinally or transversely polarized ³He target. The data cover the kinematic regions of the quasi-elastic, resonance production and beyond. From the extracted spin-structure functions, the first moments Γ₁‾(Q²), Γ₂(Q²) and I_TT(Q²) are evaluated with high precision for the neutron in the Q² range from 0.035 to 0.24GeV². The comparison of the data and the chiral effective field theory predictions reveals the importance of proper treatment of the Δ degree of freedom for spin observables.

Original language	English
Article number	135428
Journal	Physics Letters B
Volume	805
DOIs	https://doi.org/10.1016/j.physletb.2020.135428
State	Published - Jun 10 2020
Externally published	Yes

Funding

We acknowledge the outstanding support of the Jefferson Lab Hall A technical staff and the Physics and Accelerator Divisions that made this work possible. We thank A. Deltuva, J. Golak, F. Hagelstein, H. Krebs, V. Lensky, U.-G. Meißner, V. Pascalutsa, G. Salmè, S. Scopetta and M. Vanderhaeghen for useful discussions and for sharing their calculations. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177 , and by the NSF under grant PHY-0099557 .

Funders	Funder number
National Science Foundation	1714792, PHY-0099557
U.S. Department of Energy
Directorate for Mathematical and Physical Sciences	0099557
Office of Science
Nuclear Physics	DE-AC05-06OR23177

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10.1016/j.physletb.2020.135428

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@article{42f3117e64254fb6a3f10dbc9d25f607,

title = "Measurement of the 3He spin-structure functions and of neutron (3He) spin-dependent sum rules at 0.035 ≤ Q2 ≤ 0.24 GeV2 ",

abstract = "The spin-structure functions g1 and g2, and the spin-dependent partial cross-section σTT have been extracted from the polarized cross-sections differences, Δσ∥(ν,Q2) and Δσ⊥(ν,Q2) measured for the He3→(e→,e′)X reaction, in the E97-110 experiment at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of 6∘ and 9∘ from a longitudinally or transversely polarized 3He target. The data cover the kinematic regions of the quasi-elastic, resonance production and beyond. From the extracted spin-structure functions, the first moments Γ1‾(Q2), Γ2(Q2) and ITT(Q2) are evaluated with high precision for the neutron in the Q2 range from 0.035 to 0.24GeV2. The comparison of the data and the chiral effective field theory predictions reveals the importance of proper treatment of the Δ degree of freedom for spin observables.",

author = "{Jefferson Lab E97-110 Collaboration} and V. Sulkosky and Singh, {J. T.} and C. Peng and Chen, {J. P.} and A. Deur and S. Abrahamyan and Aniol, {K. A.} and Armstrong, {D. S.} and T. Averett and Bailey, {S. L.} and A. Beck and P. Bertin and F. Butaru and W. Boeglin and A. Camsonne and Cates, {G. D.} and Chang, {C. C.} and Seonho Choi and E. Chudakov and L. Coman and Cornejo, {J. C.} and B. Craver and F. Cusanno and {De Leo}, R. and {de Jager}, {C. W.} and Denton, {J. D.} and S. Dhamija and R. Feuerbach and Finn, {J. M.} and S. Frullani and K. Fuoti and H. Gao and F. Garibaldi and O. Gayou and R. Gilman and A. Glamazdin and C. Glashausser and J. Gomez and Hansen, {J. O.} and D. Hayes and B. Hersman and Higinbotham, {D. W.} and T. Holmstrom and Humensky, {T. B.} and Hyde, {C. E.} and H. Ibrahim and M. Iodice and X. Jiang and Kaufman, {L. J.} and J. Niedziela",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s)",

year = "2020",

month = jun,

day = "10",

doi = "10.1016/j.physletb.2020.135428",

language = "English",

volume = "805",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

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TY - JOUR

T1 - Measurement of the 3He spin-structure functions and of neutron (3He) spin-dependent sum rules at 0.035 ≤ Q2 ≤ 0.24 GeV2

AU - Jefferson Lab E97-110 Collaboration

AU - Sulkosky, V.

AU - Singh, J. T.

AU - Peng, C.

AU - Chen, J. P.

AU - Deur, A.

AU - Abrahamyan, S.

AU - Aniol, K. A.

AU - Armstrong, D. S.

AU - Averett, T.

AU - Bailey, S. L.

AU - Beck, A.

AU - Bertin, P.

AU - Butaru, F.

AU - Boeglin, W.

AU - Camsonne, A.

AU - Cates, G. D.

AU - Chang, C. C.

AU - Choi, Seonho

AU - Chudakov, E.

AU - Coman, L.

AU - Cornejo, J. C.

AU - Craver, B.

AU - Cusanno, F.

AU - De Leo, R.

AU - de Jager, C. W.

AU - Denton, J. D.

AU - Dhamija, S.

AU - Feuerbach, R.

AU - Finn, J. M.

AU - Frullani, S.

AU - Fuoti, K.

AU - Gao, H.

AU - Garibaldi, F.

AU - Gayou, O.

AU - Gilman, R.

AU - Glamazdin, A.

AU - Glashausser, C.

AU - Gomez, J.

AU - Hansen, J. O.

AU - Hayes, D.

AU - Hersman, B.

AU - Higinbotham, D. W.

AU - Holmstrom, T.

AU - Humensky, T. B.

AU - Hyde, C. E.

AU - Ibrahim, H.

AU - Iodice, M.

AU - Jiang, X.

AU - Kaufman, L. J.

AU - Niedziela, J.

PY - 2020/6/10

Y1 - 2020/6/10

N2 - The spin-structure functions g1 and g2, and the spin-dependent partial cross-section σTT have been extracted from the polarized cross-sections differences, Δσ∥(ν,Q2) and Δσ⊥(ν,Q2) measured for the He3→(e→,e′)X reaction, in the E97-110 experiment at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of 6∘ and 9∘ from a longitudinally or transversely polarized 3He target. The data cover the kinematic regions of the quasi-elastic, resonance production and beyond. From the extracted spin-structure functions, the first moments Γ1‾(Q2), Γ2(Q2) and ITT(Q2) are evaluated with high precision for the neutron in the Q2 range from 0.035 to 0.24GeV2. The comparison of the data and the chiral effective field theory predictions reveals the importance of proper treatment of the Δ degree of freedom for spin observables.

AB - The spin-structure functions g1 and g2, and the spin-dependent partial cross-section σTT have been extracted from the polarized cross-sections differences, Δσ∥(ν,Q2) and Δσ⊥(ν,Q2) measured for the He3→(e→,e′)X reaction, in the E97-110 experiment at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of 6∘ and 9∘ from a longitudinally or transversely polarized 3He target. The data cover the kinematic regions of the quasi-elastic, resonance production and beyond. From the extracted spin-structure functions, the first moments Γ1‾(Q2), Γ2(Q2) and ITT(Q2) are evaluated with high precision for the neutron in the Q2 range from 0.035 to 0.24GeV2. The comparison of the data and the chiral effective field theory predictions reveals the importance of proper treatment of the Δ degree of freedom for spin observables.

UR - http://www.scopus.com/inward/record.url?scp=85083864072&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2020.135428

DO - 10.1016/j.physletb.2020.135428

M3 - Article

AN - SCOPUS:85083864072

SN - 0370-2693

VL - 805

JO - Physics Letters B

JF - Physics Letters B

M1 - 135428

ER -

Measurement of the ³He spin-structure functions and of neutron (³He) spin-dependent sum rules at 0.035 ≤ Q² ≤ 0.24 GeV²

Abstract

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Measurement of the 3He spin-structure functions and of neutron (3He) spin-dependent sum rules at 0.035 ≤ Q2 ≤ 0.24 GeV2

Abstract

Funding

Access to Document

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Fingerprint

Cite this

Measurement of the ³He spin-structure functions and of neutron (³He) spin-dependent sum rules at 0.035 ≤ Q² ≤ 0.24 GeV²