Measurement of the α -Particle Monopole Transition Form Factor Challenges Theory: A Low-Energy Puzzle for Nuclear Forces

S. Kegel; P. Achenbach; S. Bacca; N. Barnea; J. Beričič; D. Bosnar; L. Correa; M. O. Distler; A. Esser; H. Fonvieille; I. Friščić; M. Heilig; P. Herrmann; M. Hoek; P. Klag; T. Kolar; W. Leidemann; H. Merkel; M. Mihovilovič; J. Müller; U. Müller; G. Orlandini; J. Pochodzalla; B. S. Schlimme; M. Schoth; F. Schulz; C. Sfienti; S. Širca; R. Spreckels; Y. Stöttinger; M. Thiel; A. Tyukin; T. Walcher; A. Weber

doi:10.1103/physrevlett.130.152502

Measurement of the α -Particle Monopole Transition Form Factor Challenges Theory: A Low-Energy Puzzle for Nuclear Forces

S. Kegel, P. Achenbach, S. Bacca, N. Barnea, J. Beričič, D. Bosnar, L. Correa, M. O. Distler, A. Esser, H. Fonvieille, I. Friščić, M. Heilig, P. Herrmann, M. Hoek, P. Klag, T. Kolar, W. Leidemann, H. Merkel, M. Mihovilovič, J. MüllerU. Müller, G. Orlandini, J. Pochodzalla, B. S. Schlimme, M. Schoth, F. Schulz, C. Sfienti^*, S. Širca, R. Spreckels, Y. Stöttinger, M. Thiel, A. Tyukin, T. Walcher, A. Weber

^*Corresponding author for this work

Racah Institute of Physics

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

9 Scopus citations

Abstract

We perform a systematic study of the α-particle excitation from its ground state 0_{1}^{+} to the 0_{2}^{+} resonance. The so-called monopole transition form factor is investigated via an electron scattering experiment in a broad Q^{2} range (from 0.5 to 5.0 fm^{-2}). The precision of the new data dramatically supersedes that of older sets of data, each covering only a portion of the Q^{2} range. The new data allow the determination of two coefficients in a low-momentum expansion, leading to a new puzzle. By confronting experiment to state-of-the-art theoretical calculations, we observe that modern nuclear forces, including those derived within chiral effective field theory that are well tested on a variety of observables, fail to reproduce the excitation of the α particle.

Original language	English
Article number	152502
Journal	Physical Review Letters
Volume	130
Issue number	15
DOIs	https://doi.org/10.1103/physrevlett.130.152502
State	Published - 14 Apr 2023

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© 2023 American Physical Society.

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Kegel, S., Achenbach, P., Bacca, S., Barnea, N., Beričič, J., Bosnar, D., Correa, L., Distler, M. O., Esser, A., Fonvieille, H., Friščić, I., Heilig, M., Herrmann, P., Hoek, M., Klag, P., Kolar, T., Leidemann, W., Merkel, H., Mihovilovič, M., ... Weber, A. (2023). Measurement of the α -Particle Monopole Transition Form Factor Challenges Theory: A Low-Energy Puzzle for Nuclear Forces. Physical Review Letters, 130(15), Article 152502. https://doi.org/10.1103/physrevlett.130.152502

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title = "Measurement of the α -Particle Monopole Transition Form Factor Challenges Theory: A Low-Energy Puzzle for Nuclear Forces",

abstract = "We perform a systematic study of the α-particle excitation from its ground state 0_{1}^{+} to the 0_{2}^{+} resonance. The so-called monopole transition form factor is investigated via an electron scattering experiment in a broad Q^{2} range (from 0.5 to 5.0 fm^{-2}). The precision of the new data dramatically supersedes that of older sets of data, each covering only a portion of the Q^{2} range. The new data allow the determination of two coefficients in a low-momentum expansion, leading to a new puzzle. By confronting experiment to state-of-the-art theoretical calculations, we observe that modern nuclear forces, including those derived within chiral effective field theory that are well tested on a variety of observables, fail to reproduce the excitation of the α particle.",

author = "S. Kegel and P. Achenbach and S. Bacca and N. Barnea and J. Beri{\v c}i{\v c} and D. Bosnar and L. Correa and Distler, {M. O.} and A. Esser and H. Fonvieille and I. Fri{\v s}{\v c}i{\'c} and M. Heilig and P. Herrmann and M. Hoek and P. Klag and T. Kolar and W. Leidemann and H. Merkel and M. Mihovilovi{\v c} and J. M{\"u}ller and U. M{\"u}ller and G. Orlandini and J. Pochodzalla and Schlimme, {B. S.} and M. Schoth and F. Schulz and C. Sfienti and S. {\v S}irca and R. Spreckels and Y. St{\"o}ttinger and M. Thiel and A. Tyukin and T. Walcher and A. Weber",

note = "Publisher Copyright: {\textcopyright} 2023 American Physical Society.",

year = "2023",

month = apr,

day = "14",

doi = "10.1103/physrevlett.130.152502",

language = "אנגלית",

volume = "130",

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Kegel, S, Achenbach, P, Bacca, S, Barnea, N, Beričič, J, Bosnar, D, Correa, L, Distler, MO, Esser, A, Fonvieille, H, Friščić, I, Heilig, M, Herrmann, P, Hoek, M, Klag, P, Kolar, T, Leidemann, W, Merkel, H, Mihovilovič, M, Müller, J, Müller, U, Orlandini, G, Pochodzalla, J, Schlimme, BS, Schoth, M, Schulz, F, Sfienti, C, Širca, S, Spreckels, R, Stöttinger, Y, Thiel, M, Tyukin, A, Walcher, T & Weber, A 2023, 'Measurement of the α -Particle Monopole Transition Form Factor Challenges Theory: A Low-Energy Puzzle for Nuclear Forces', Physical Review Letters, vol. 130, no. 15, 152502. https://doi.org/10.1103/physrevlett.130.152502

TY - JOUR

T1 - Measurement of the α -Particle Monopole Transition Form Factor Challenges Theory

T2 - A Low-Energy Puzzle for Nuclear Forces

AU - Kegel, S.

AU - Achenbach, P.

AU - Bacca, S.

AU - Barnea, N.

AU - Beričič, J.

AU - Bosnar, D.

AU - Correa, L.

AU - Distler, M. O.

AU - Esser, A.

AU - Fonvieille, H.

AU - Friščić, I.

AU - Heilig, M.

AU - Herrmann, P.

AU - Hoek, M.

AU - Klag, P.

AU - Kolar, T.

AU - Leidemann, W.

AU - Merkel, H.

AU - Mihovilovič, M.

AU - Müller, J.

AU - Müller, U.

AU - Orlandini, G.

AU - Pochodzalla, J.

AU - Schlimme, B. S.

AU - Schoth, M.

AU - Schulz, F.

AU - Sfienti, C.

AU - Širca, S.

AU - Spreckels, R.

AU - Stöttinger, Y.

AU - Thiel, M.

AU - Tyukin, A.

AU - Walcher, T.

AU - Weber, A.

PY - 2023/4/14

Y1 - 2023/4/14

N2 - We perform a systematic study of the α-particle excitation from its ground state 0_{1}^{+} to the 0_{2}^{+} resonance. The so-called monopole transition form factor is investigated via an electron scattering experiment in a broad Q^{2} range (from 0.5 to 5.0 fm^{-2}). The precision of the new data dramatically supersedes that of older sets of data, each covering only a portion of the Q^{2} range. The new data allow the determination of two coefficients in a low-momentum expansion, leading to a new puzzle. By confronting experiment to state-of-the-art theoretical calculations, we observe that modern nuclear forces, including those derived within chiral effective field theory that are well tested on a variety of observables, fail to reproduce the excitation of the α particle.

AB - We perform a systematic study of the α-particle excitation from its ground state 0_{1}^{+} to the 0_{2}^{+} resonance. The so-called monopole transition form factor is investigated via an electron scattering experiment in a broad Q^{2} range (from 0.5 to 5.0 fm^{-2}). The precision of the new data dramatically supersedes that of older sets of data, each covering only a portion of the Q^{2} range. The new data allow the determination of two coefficients in a low-momentum expansion, leading to a new puzzle. By confronting experiment to state-of-the-art theoretical calculations, we observe that modern nuclear forces, including those derived within chiral effective field theory that are well tested on a variety of observables, fail to reproduce the excitation of the α particle.

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DO - 10.1103/physrevlett.130.152502

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C2 - 37115897

AN - SCOPUS:85152950265

SN - 0031-9007

VL - 130

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

M1 - 152502

ER -

Measurement of the α -Particle Monopole Transition Form Factor Challenges Theory: A Low-Energy Puzzle for Nuclear Forces

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