Effective range function below threshold
نویسندگان
چکیده
منابع مشابه
Effective range function below threshold
We demonstrate that the kernel of the Lippmann-Schwinger equation, associated with interactions consisting of a sum of the Coulomb plus a short range nuclear potential, below threshold becomes degenerate. Taking advantage of this fact, we present a simple method of calculating the effective range function for negative energies. This may be useful in practice since the effective range expansion ...
متن کاملCharmonium Spectroscopy Below Open Flavor Threshold
Charm quark has large mass (∼1.5 GeV) compared to the masses of u, d, s quarks. Velocity of the charm quarks in hadrons is not too relativistic ((v/c) ∼0.2). Strong coupling constant αs(mc) is small (∼0.3). Therefore charmonium spectroscopy is a good testing ground for the theories of strong interactions: quantum cromodynamics (QCD) in both perturbative and nonperturbative regimes, QCD inspired...
متن کاملBackgrounds to 7 studies below charm threshold
Using DELCO data obtained at SPEAR, we evaluate the backgrounds to r+rdata samples below open charm threshold at the r-charm Factory (TcF). With a singletagging signature (electron and missing energy, Emiss), which is unique to the rcF, the backgrounds are found to be below 0.1%. 1 Requirements for future T data samples In order to make significant progress in r physics, future data samples mus...
متن کاملDeuteron Compton Scattering below Pion Photoproduction Threshold
Deuteron Compton scattering below pion photoproduction threshold is considered in the framework of the non-relativistic diagrammatic approach with the Bonn OBE potential. The complete gauge-invariant set of diagrams is taken into account which includes resonance diagrams without and with rescattering and diagrams with oneand two-body seagulls. The obtained results are compared with predictions ...
متن کاملEffects of human pregnancy on cardiac autonomic function above and below the ventilatory threshold.
This study examined the effects of human pregnancy on heart rate variability (HRV), spontaneous baroreflex (SBR) sensitivity, and plasma catecholamines at rest and during exercise. Subjects were 14 healthy, physically active pregnant women (PG; mean gestational age = 33.9 +/- 1.0 wk). Results were compared with an age-matched nonpregnant control group (NPG; n = 14) with similar characteristics....
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics G: Nuclear and Particle Physics
سال: 2000
ISSN: 0954-3899,1361-6471
DOI: 10.1088/0954-3899/26/12/306