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, P.Evtoukhovitch, 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 *1*2C(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 *1*2C(K*-, K*+) reaction, the binding energy of a *X^- hyperon in a core *1*1B nucleus, B&sub(*X)− , 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 *1*2&sub(*X)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 *X-hypernuclear states, to the background bution. The peak positions were obtained to be B&sub(*X)− = 8.9 ± 1.4 (stat.) &sup(+3.8)&sub(-3.1) (syst.) MeV and B&sub(*X)− = −2.4 ± 1.3 (stat.) &sup(+2.8)&sub(−1.2) (syst.) MeV. Another model assumption, one Breit–Wigner function with B&sub(*X)− = −2.7 ± 2.2 (stat.) &sup(+0.5)&sub(−0.7) (syst.) MeV and *G = 4.1 ± 2.1 (stat.) &sup(+1.2)&sub(−0.7) syst.) MeV, also yielded a similar χ*2 value.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 344.1 - Методы и аппаратура для регистрации элементарных частиц и фотонов$
Спец.(статьи,препринты) = С 346.5а - Образование гиперонов и К-мезонов частицами и гамма-квантами
Бюллетени = 51/024