Observation of H Λ4 hyperhydrogen by decay-pion spectroscopy in electron scattering

A. Esser; S. Nagao; F. Schulz; P. Achenbach; C. Ayerbe Gayoso; R. Böhm; O. Borodina; D. Bosnar; V. Bozkurt; L. Debenjak; M. O. Distler; I. Friščić; Y. Fujii; T. Gogami; O. Hashimoto; S. Hirose; H. Kanda; M. Kaneta; E. Kim; Y. Kohl; J. Kusaka; A. Margaryan; H. Merkel; M. Mihovilovič; U. Müller; S. N. Nakamura; J. Pochodzalla; C. Rappold; J. Reinhold; T. R. Saito; A. Sanchez Lorente; S. Sánchez Majos; B. S. Schlimme; M. Schoth; C. Sfienti; S. Širca; L. Tang; M. Thiel; K. Tsukada; A. Weber; K. Yoshida

doi:10.1103/PhysRevLett.114.232501

Observation of H Λ4 hyperhydrogen by decay-pion spectroscopy in electron scattering

A. Esser, S. Nagao, F. Schulz, P. Achenbach, C. Ayerbe Gayoso, R. Böhm, O. Borodina, D. Bosnar, V. Bozkurt, L. Debenjak, M. O. Distler, I. Friščić, Y. Fujii, T. Gogami, O. Hashimoto, S. Hirose, H. Kanda, M. Kaneta, E. Kim, Y. KohlJ. Kusaka, A. Margaryan, H. Merkel, M. Mihovilovič, U. Müller, S. N. Nakamura, J. Pochodzalla, C. Rappold, J. Reinhold, T. R. Saito, A. Sanchez Lorente, S. Sánchez Majos, B. S. Schlimme, M. Schoth, C. Sfienti, S. Širca, L. Tang, M. Thiel, K. Tsukada, A. Weber, K. Yoshida

SCI - Physics

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

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Abstract

At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a Be9 target in order to study the Λ binding energy of light hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at 0° forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. Coincidentally, negatively charged decay pions were detected by two independent high-resolution spectrometers. About 103 pionic weak decays of hyperfragments and hyperons were observed. The pion momentum distribution shows a monochromatic peak at pπ≈133MeV/c, corresponding to the unique signature for the two-body decay of hyperhydrogen HΛ4→He4+π-, stopped inside the target. Its Λ binding energy was determined to be BΛ=2.12±0.01(stat)±0.09(syst)MeV with respect to the H3+Λ mass.

Original language	English
Article number	232501
Journal	Physical Review Letters
Volume	114
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.114.232501
Publication status	Published - 2015 Jun 9

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Esser, A., Nagao, S., Schulz, F., Achenbach, P., Ayerbe Gayoso, C., Böhm, R., Borodina, O., Bosnar, D., Bozkurt, V., Debenjak, L., Distler, M. O., Friščić, I., Fujii, Y., Gogami, T., Hashimoto, O., Hirose, S., Kanda, H., Kaneta, M., Kim, E., ... Yoshida, K. (2015). Observation of H Λ4 hyperhydrogen by decay-pion spectroscopy in electron scattering. Physical Review Letters, 114(23), Article 232501. https://doi.org/10.1103/PhysRevLett.114.232501

@article{494368a3fe9b4addb0b2f92a79aa4a0e,

title = "Observation of H Λ4 hyperhydrogen by decay-pion spectroscopy in electron scattering",

abstract = "At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a Be9 target in order to study the Λ binding energy of light hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at 0° forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. Coincidentally, negatively charged decay pions were detected by two independent high-resolution spectrometers. About 103 pionic weak decays of hyperfragments and hyperons were observed. The pion momentum distribution shows a monochromatic peak at pπ≈133MeV/c, corresponding to the unique signature for the two-body decay of hyperhydrogen HΛ4→He4+π-, stopped inside the target. Its Λ binding energy was determined to be BΛ=2.12±0.01(stat)±0.09(syst)MeV with respect to the H3+Λ mass.",

author = "A. Esser and S. Nagao and F. Schulz and P. Achenbach and {Ayerbe Gayoso}, C. and R. B{\"o}hm and O. Borodina and D. Bosnar and V. Bozkurt and L. Debenjak and Distler, {M. O.} and I. Fri{\v s}{\v c}i{\'c} and Y. Fujii and T. Gogami and O. Hashimoto and S. Hirose and H. Kanda and M. Kaneta and E. Kim and Y. Kohl and J. Kusaka and A. Margaryan and H. Merkel and M. Mihovilovi{\v c} and U. M{\"u}ller and Nakamura, {S. N.} and J. Pochodzalla and C. Rappold and J. Reinhold and Saito, {T. R.} and {Sanchez Lorente}, A. and {S{\'a}nchez Majos}, S. and Schlimme, {B. S.} and M. Schoth and C. Sfienti and S. {\v S}irca and L. Tang and M. Thiel and K. Tsukada and A. Weber and K. Yoshida",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = jun,

day = "9",

doi = "10.1103/PhysRevLett.114.232501",

language = "English",

volume = "114",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "23",

}

Esser, A, Nagao, S, Schulz, F, Achenbach, P, Ayerbe Gayoso, C, Böhm, R, Borodina, O, Bosnar, D, Bozkurt, V, Debenjak, L, Distler, MO, Friščić, I, Fujii, Y, Gogami, T, Hashimoto, O, Hirose, S, Kanda, H, Kaneta, M, Kim, E, Kohl, Y, Kusaka, J, Margaryan, A, Merkel, H, Mihovilovič, M, Müller, U, Nakamura, SN, Pochodzalla, J, Rappold, C, Reinhold, J, Saito, TR, Sanchez Lorente, A, Sánchez Majos, S, Schlimme, BS, Schoth, M, Sfienti, C, Širca, S, Tang, L, Thiel, M, Tsukada, K, Weber, A & Yoshida, K 2015, 'Observation of H Λ4 hyperhydrogen by decay-pion spectroscopy in electron scattering', Physical Review Letters, vol. 114, no. 23, 232501. https://doi.org/10.1103/PhysRevLett.114.232501

TY - JOUR

T1 - Observation of H Λ4 hyperhydrogen by decay-pion spectroscopy in electron scattering

AU - Esser, A.

AU - Nagao, S.

AU - Schulz, F.

AU - Achenbach, P.

AU - Ayerbe Gayoso, C.

AU - Böhm, R.

AU - Borodina, O.

AU - Bosnar, D.

AU - Bozkurt, V.

AU - Debenjak, L.

AU - Distler, M. O.

AU - Friščić, I.

AU - Fujii, Y.

AU - Gogami, T.

AU - Hashimoto, O.

AU - Hirose, S.

AU - Kanda, H.

AU - Kaneta, M.

AU - Kim, E.

AU - Kohl, Y.

AU - Kusaka, J.

AU - Margaryan, A.

AU - Merkel, H.

AU - Mihovilovič, M.

AU - Müller, U.

AU - Nakamura, S. N.

AU - Pochodzalla, J.

AU - Rappold, C.

AU - Reinhold, J.

AU - Saito, T. R.

AU - Sanchez Lorente, A.

AU - Sánchez Majos, S.

AU - Schlimme, B. S.

AU - Schoth, M.

AU - Sfienti, C.

AU - Širca, S.

AU - Tang, L.

AU - Thiel, M.

AU - Tsukada, K.

AU - Weber, A.

AU - Yoshida, K.

PY - 2015/6/9

Y1 - 2015/6/9

N2 - At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a Be9 target in order to study the Λ binding energy of light hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at 0° forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. Coincidentally, negatively charged decay pions were detected by two independent high-resolution spectrometers. About 103 pionic weak decays of hyperfragments and hyperons were observed. The pion momentum distribution shows a monochromatic peak at pπ≈133MeV/c, corresponding to the unique signature for the two-body decay of hyperhydrogen HΛ4→He4+π-, stopped inside the target. Its Λ binding energy was determined to be BΛ=2.12±0.01(stat)±0.09(syst)MeV with respect to the H3+Λ mass.

AB - At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a Be9 target in order to study the Λ binding energy of light hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at 0° forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. Coincidentally, negatively charged decay pions were detected by two independent high-resolution spectrometers. About 103 pionic weak decays of hyperfragments and hyperons were observed. The pion momentum distribution shows a monochromatic peak at pπ≈133MeV/c, corresponding to the unique signature for the two-body decay of hyperhydrogen HΛ4→He4+π-, stopped inside the target. Its Λ binding energy was determined to be BΛ=2.12±0.01(stat)±0.09(syst)MeV with respect to the H3+Λ mass.

UR - http://www.scopus.com/inward/record.url?scp=84935870984&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84935870984&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.114.232501

DO - 10.1103/PhysRevLett.114.232501

M3 - Article

AN - SCOPUS:84935870984

SN - 0031-9007

VL - 114

JO - Physical Review Letters

JF - Physical Review Letters

IS - 23

M1 - 232501

ER -

Observation of H Λ4 hyperhydrogen by decay-pion spectroscopy in electron scattering

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