Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'506'133
Articles rated: 2609

26 April 2024

» arxiv » 1501.6823

Article overview

Observation of Lambda H-4 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 ;
Date:	27 Jan 2015
Abstract:	At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a Be-9 target in order to study the ground-state masses of Lambda-hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at zero degree forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. In coincidence, negatively charged decay-pions were detected by two independent high-resolution spectrometers. About 10^3 pionic weak decays of hyperfragments and hyperons were observed. The pion momentum distribution shows a monochromatic peak at p_pi ~ 133 MeV/c, corresponding to the unique signature for the two-body decay of hyperhydrogen Lambda H-4 -> He-4 + pi-, stopped inside the target. Its binding energy was determined to be B_Lambda = 2.12 +- 0.01 (stat.) +- 0.09 (syst.) MeV with respect to the H-3 + Lambda mass.
Source:	arXiv, 1501.6823
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap