High-Resolution Decay-Pion Spectroscopy of \({}_{\Lambda }^{4}\text{H}\) Hypernuclei | Zendy

P. Achenbach | Zendy; Fabian Schulz | Zendy; S. Nagao | Zendy; S. Aulenbacher | Zendy; J. Beričič | Zendy; S. Bleser | Zendy; R. Böhm | Zendy; D. Bosnar | Zendy; L. Correa | Zendy; M. O. Distler | Zendy; A. Esser | Zendy; H. Fonvieille | Zendy; I. Friščić | Zendy; Y. Fujii | Zendy; Masafumi Fujita | Zendy; T. Gogami | Zendy; H. Kanda | Zendy; M. Kaneta | Zendy; S. Kegel | Zendy; Y. Kohl | Zendy; W. Kusaka | Zendy; A. Margaryan | Zendy; H. Merkel | Zendy; M. Mihovilovič | Zendy; U. Müller | Zendy; Satoshi N. Nakamura | Zendy; J. Pochodzalla | Zendy; A. Sánchez Lorente | Zendy; B. S. Schlimme | Zendy; M. Schoth | Zendy; C. Sfienti | Zendy; S. Širca | Zendy; Marcell Steinen | Zendy; Y. Takahashi | Zendy; L. Tang | Zendy; M. Thiel | Zendy; K. Tsukada | Zendy; A. Tyukin | Zendy; A. Weber | Zendy

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High-Resolution Decay-Pion Spectroscopy of \({}_{\Lambda }^{4}\text{H}\) Hypernuclei

Author(s) -

P. Achenbach,

Fabian Schulz,

S. Nagao,

S. Aulenbacher,

J. Beričič,

S. Bleser,

R. Böhm,

D. Bosnar,

L. Correa,

M. O. Distler,

A. Esser,

H. Fonvieille,

I. Friščić,

Y. Fujii,

Masafumi Fujita,

T. Gogami,

H. Kanda,

M. Kaneta,

S. Kegel,

Y. Kohl,

W. Kusaka,

A. Margaryan,

H. Merkel,

M. Mihovilovič,

U. Müller,

Satoshi N. Nakamura,

J. Pochodzalla,

A. Sánchez Lorente,

B. S. Schlimme,

M. Schoth,

C. Sfienti,

S. Širca,

Marcell Steinen,

Y. Takahashi,

L. Tang,

M. Thiel,

K. Tsukada,

A. Tyukin,

A. Weber

Publication year - 2017

Publication title -

proceedings of the 12th international conference on hypernuclear and strange particle physics (hyp2015)

Language(s) - English

Resource type - Conference proceedings

DOI - 10.7566/jpscp.17.011001

Subject(s) - pion , physics , spectrometer , microtron , lambda , nuclear physics , nuclear emulsion , spectroscopy , momentum (technical analysis) , resolution (logic) , calibration , particle physics , optics , computer science , quantum mechanics , electron , finance , economics , artificial intelligence

International audienceThe first observation of \({}_{\Lambda }^{4}\text{H}\) fragments by means of decay-pion spectroscopy with a high resolution magnetic spectrometer was achieved in 2012 at the Mainz Microtron MAMI. The extracted Λ binding energy was consistent with older nuclear emulsion data, but almost one order of magnitude higher in precision, while being limited by systematic uncertainties. This paper gives details on the kaon tagging at 0° forward angle which was indispensable for the success of the experiment. In addition, a re-analysis of the data collected in 2012 is presented, including an improved a posteriori spectrometer calibration and a more robust fitting of the decay-pion peak in the momentum spectrum

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