A new mechanism for the pp → ppπ reaction close to threshold is suggested coming from the isoscalar excitation of the Roper and its decay into N(ππ)s−wave, with one of the π 0 emitted and the other one reabsorbed on the second nucleon. The mechanism can lead to important interference with other mechanisms and, together with experiment, serves to exclude large ranges of the 2π N decay parameters...

T H E parasexual cycle first demonstrated in Aspergillus nidulans ( PONTECORVO, ROPER, HEMMONS, MACDONALD and BUFTON 1953) has provided a means for genetic investigations in other species of filamentous fungi, particularly those lacking a perfect stage. In the genus Penicillium, the parasexual cycle has been demonstrated in P. chrysogenum (PONTECORVO and SERMONTI 1954) , P. expansum ( BARRON 19...

In Roper v. Simmons, the U.S. Supreme Court was once again asked to determine if the execution of a juvenile, aged 16 or 17 years at the time of the offense, represents cruel and unusual punishment. In a five-to-four decision, the U.S. Supreme Court affirmed the decision of the Supreme Court of Missouri to overturn the death penalty of Christopher Simmons and held that the execution of juvenile...

The calculation of the light-hadron spectrum in the quenched approximation to QCD using an anisotropic clover fermion action is presented. The tuning of the parameters of the action is discussed, using the pion and ρ dispersion relation. The adoption of an anisotropic lattice provides clear advantages in the determination of the baryonic resonances, and in particular that of the so-called Roper...

ECTOPIA of the macula is a striking clinical condition but has been infrequently described, only fourteen cases having been reported: Kruger (1913), Triebenstein (1919), Beselin (1924, 1925), Bielschowsky (1930), Stein (1931), Friedman (1942), Cohen and Weisberg (1950), and Trevor-Roper (1952). Fuchs (1921) described a further eight specimens in which the diagnosis was made histologically after...

We show that two almost degenerate poles near the piDelta threshold and the next higher mass pole in the P11 partial wave of piN scattering evolve from a single bare state through its coupling with piN, etaN, and pipiN reaction channels. This finding provides new information on understanding the dynamical origins of the Roper N{*}(1440) and N{*}(1710) resonances listed by Particle Data Group. O...