Abstract
The trigger system of the HyperNIS spectrometer, which was proposed for distinguishing events with the formation and subsequent decay of relativistic hyperfragments, is described. The operation of the system is based on detecting the charges of the hyperfragment and the product nucleus in two-particle π–-meson decay. The events are selected using scintillation and Cherenkov counters. This article presents the results of a methodological work on updating the equipment and software of the experiment, describes the characteristics of trigger detectors, and discusses the specificities of using the trigger system in the planned experiment on the search for the \({}_{{\Lambda }}^{6}{\text{H}}\) hypernucleus. The expected efficiency and noise immunity of the event selection system are estimated.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
S. Avramenko, V. Aksinenko, M. Anikina, B. Bannik, Yu. Belikov, V. Butenko, V. Drozdov, K. Gajevski, A. Galperin, N. Glagoleva, A. Golokhvastov, K. Lovchev, N. Kaminsky, S. Khorozov, E. Khusainov, et al., “A study of the production and lifetime of the lightest relativistic hypernuclei,” Nucl. Phys. A 547, 95 (1992).
A. U. Abdurakhimov, V. D. Aksinenko, M. H. Anikina, S. A. Avramenko, B. P. Bannik, V. A. Butenko, N. S. Glagoleva, A. I. Golokhvastov, A. G. Grachev, E. A. Dementiev, V. A. Drozdov, N. I. Kaminsky, S. A. Khorozov, A. D. Kirillov, E. V. Kozubsky, et al., “Experimental study of relativistic hypernuclei using the HYBS-spectrometer,” Nuovo Cim. A 102, 645 (1989).
C. Rappold, E. Kim, D. Nakajima, T. R. Saito, O. Bertini, S. Bianchin, V. Bozkurt, M. Kavatsyuk, Y. Ma, F. Maas, S. Minami, B. Özel-Tashenov, K. Yoshida, P. Achenbach, S. Ajimura, et al., “Hypernuclear spectroscopy of products from 6Li projectiles on a carbon target at 2 A GeV,” Nucl. Phys. A 913, 170 (2013).
M. Agnello, L. Benussi, M. Bertani, H. C. Bhang, G. Bonomi, E. Botta, M. Bregant, T. Bressani, S. Bufalino, L. Busso, D. Calvo, P. Camerini, B. Dalena, F. de Mori, G. D’Erasmo, et al., “Evidence for heavy hyperhydrogen \({}_{{\Lambda }}^{6}{\text{H}}\),” Phys. Rev. Lett. 108, 042501 (2012).
H. Sugimura, M. Agnello, J. K. Ahn, S. Ajimura, Y. Akazawa, N. Amano, K. Aoki, H. C. Bhang, N. Chiga, M. Endo, P. Evtoukhovitch, A. Feliciello, H. Fujioka, T. Fukuda, S. Hasegawa, et al., “Search for \({}_{{\Lambda }}^{6}{\text{H}}\) hypernucleus by the 6Li(π–,K+) reaction at \({{p}_{{{{\pi }^{ - }}}}}\) = 1.2 GeV/c,” arXiv:1310.6104v2[nucl-ex].
Yu. A. Belikov, A. I. Golokhvastov, V. P. Kondrat’ev, L. V. Krasnov, Yu. Lukstin’sh, P. K. Man’yakov, S. A. Sedykh, I. V. Stepanov, S. A. Khorozov, and I. E. Shevchenko, “Trigger system for registering relativistic hypernuclei,” JINR Preprint No. R1-91-209 (JINR, Dubna, 1991).
M. I. Adamovich, Yu. A. Alexandrov, S. G. Gerassimov, V. A. Dronov, V. G. Larionova, N. G. Peresadko, and S. P. Kharlamov, “Dissociation of relativistic 7Li in photoemulsion and structure of 7Li nucleus,” J. Phys. G: Nucl. Part. Phys. 30, 1479–1485 (2004).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by E. Chernokozhin
Rights and permissions
About this article
Cite this article
Averyanov, A.V., Avramenko, S.A., Aksinenko, V.D. et al. Trigger System of the HyperNIS Experiment. Phys. Part. Nuclei Lett. 16, 826–834 (2019). https://doi.org/10.1134/S1547477119060360
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1547477119060360