Электронный каталог

Статья

Ichikawa, Y.
Missing-Mass Measurement of the *1*2C(K*-,K*+) Reaction at 1.8 GeV/c with the Superconducting Kaon Spectrometer / Y.Ichikawa, Z.Tsamalaidze, [a.o.] // Progress of Theoretical and Experimental Physics [Electronic resource]. – 2024. – Vol. 2024, No. 9. – P. 091D01. – URL: https://doi.org/10.1093/ptep/ptae133. – Bibliogr.: 29.

We performed a measurement of the inclusive missing-mass spectrum of the 12C(K−, K+) reaction at an incident beam momentum of 1.8 GeV/c. This measurement was carried out by using the Superconducting Kaon Spectrometer (SKS) and the K1.8 beamline spectrometer at the Hadron Experimental Facility in J-PARC. From the missing-mass of the 12C(K−, K+) reaction, the binding energy of a − hyperon in a core 11B nucleus, B− , can be calculated. Our experimental setup yielded a good energy resolution of 8.2 MeV (full width at half maximum), which allowed us to observe significant enhancements in the proximity of the 12 Be production threshold region. In order to extract information from the missing-massspectrum, we employed several fitting parameters assumptions. A good agreement with the spectrum shape was obtained by adding two Gaussian functions, with the constant experimental resolution for the -hypernuclear states, to the background bution. The peak positions were obtained to be B− = 8.9 ± 1.4 (stat.) +3.8 −3.1 (syst.) MeV and B− = −2.4 ± 1.3 (stat.) +2.8 −1.2 (syst.) MeV. Another model assumption, one Breit–Wigner function with B− = −2.7 ± 2.2 (stat.) +0.5 −0.7 (syst.) MeV and = 4.1 ± 2.1 (stat.) +1.2 −0.7 (syst.) MeV, also yielded a similar χ2 value



ОИЯИ = ОИЯИ (JINR)2024