A precise method for the detection of the two photons from the π 0 decay in hypernuclear spectroscopy
نویسندگان
چکیده
A precise method for the detection of the two photons from the π 0 decay in hypernuclear spectroscopy An experimental technique for the light Λ-hypernuclei structure studies by using (K − , π 0) reaction and Neutral Meson Spectrometer (NMS) developed at the BNL has been described. Position dependence calibration of the BGO conversion planes of the NMS was invented as the solution to the crucial constraint of the high resolution in single-Λ spec-troscopy. Position parameters of the BGO crystal rods were fitted out from the out-of-kaon beam measured data as obtained by the original small highly collimated 60 Co source method, based on the coincidences between top and bottom signals of each BGO rod.
منابع مشابه
Final State Interaction Effects in B+→J/ψ π+ Decay
In this research the exclusive decay of is calculated by QCD factorization (QCDF) method and final state interaction (FSI). First, the decay is calculated via QCDF method. The result that is found by using the QCDF method is less than the experimental result. So FSI is considered to solve the decay. For this decay, via the exchange of mesons are chosen for the intermedi...
متن کاملDynamics of Entanglement between Linearly Polarized Photons and π -Electrons in Graphene
In the present article we report the dynamical behavior of entanglement between π-electrons and photons in Graphene. It is shown that the degree of such entanglements depend on the orientation of π-electron momenta relative to the photonic polarization. Moreover, we show that as the detuning between the π-electron transition frequencies and that of the photons is increased, the degree of entang...
متن کاملNext to leading order predictions for π0γ and π0π0 production at the LHC
Next to leading order predictions for π 0 γ and π 0 π 0 production at the LHC The precise knowledge of photon pair production rates at the LHC is crucial to estimate the sensitivity to a Higgs boson in the intermediate mass range. This background consists not only of prompt photons but also of fake photons stemming from pion decay. We present next to leading order predictions for the invariant ...
متن کاملMeasurement of stopping beam distributions in the PIBETA detector
Precise calculation of the geometrical acceptance of a large solid angle detector with an integrated stopping target relies on precise knowledge of the beam geometry. We describe four alternative methods that we used to measure the beam stopping distributions in the PIBETA detector active target: (i) light response of segmented target elements to incident beam particles, (ii) backtracking of ch...
متن کاملTwo photon decay of the pseudoscalars, the chiral symmetry breaking corrections
The extrapolation of the decay amplitudes of the pseudoscalar mesons into two photons from the soft meson limit where it is obtained from the axial-anomaly to the mass shell involves the contribution of the 0− continuum. These chiral symmetry breaking corrections turn out to be large. The effects of these corrections on the calculated π decay rate, on the values of the singlet-octet mixing angl...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003