Papers by 19MKT034 Abdus Salam
Physics Letters B, 1983
We investigate the stability of Poincaré× O (3) invariant solutions for a pure semi-simple Yang-M... more We investigate the stability of Poincaré× O (3) invariant solutions for a pure semi-simple Yang-Mills, as well as Yang-Mills coupled to gravity in 6-dimensional space-time compactified over M4× S2. In contrast to the Maxwell U (1) theory [6] in six dimensions ...
Physics Letters B, 1985
We show that a gauged supergravity theory based on E 6 × E7 × U(1) is free of gauge and gravitati... more We show that a gauged supergravity theory based on E 6 × E7 × U(1) is free of gauge and gravitational anomalies in six dimensions. It compactifies to (Minkowski) 4 × S 2 by the standard monopole mechanism. With a monopole of strength n in E6, the resulting four-dimensional theory exhibits chiral SO(10) X U(1) with 2 In l families (and no antifamilies). Supersymmetry is broken.
Physics Letters B, 1982
A maximal extended supergravity lagrangian is constructed in seven dimensions, which exhibits USp... more A maximal extended supergravity lagrangian is constructed in seven dimensions, which exhibits USp(4) ~ SO(5) local and SL(5, Iq) global invariances. We find that the antisymmetric second rank tensor fields must possess a generalized gauge invariance in order that the theory is consistent and supersymmetric. We conjecture that the theory might admit SO(5) × SO(5) Yang-Mills symmetries in d = 7 and SO(4) X SO(5) X SO(5) in d = 4 [with the last SO(5), gauging composite fields] after suitable compactification.
Physical Review D, 1971
A Lagrangian theory is formulated describing the intrinsic mixing oi the graviton with a massive ... more A Lagrangian theory is formulated describing the intrinsic mixing oi the graviton with a massive 2+ f meson which interacts universally with hadrons through the stress tensor. The theory is developed as an analog of the well-known p-y model of hadron electrodynamics, and in particular a Geld-current identity is exhibited which equates the massive 2+ meson with the hadronic energy-momentum tensor. An Einstein-type Lagrangian is used for both spin-2 particles, and general covariance is preserved throughout. The nonlinear coupling of the hadrons to the f meson leads, within the framework of nonpolynomial 6eld theories, to a universal cuto6 for strong-interaction physics.
Physical Review D, 1973
In order to conform with the standard inclusive reaction. notation, the transverse masses are def... more In order to conform with the standard inclusive reaction. notation, the transverse masses are defined differently here than they were in I. In response to a question by C. Lovelace at the Sixteenth International Conference on High Energy Physics, (National Accelerator Laboratory, Batavia, Ill. , 1972) about what effect a positive cut would have on phenomenology, C. Michael replied, "Absolute disaster. "
Physical Review D, 1983
Abstract Using a light-cone gauge formulation for N= 4 extended supersymmetry, it is shown that a... more Abstract Using a light-cone gauge formulation for N= 4 extended supersymmetry, it is shown that an explicit breaking of the supersymmetry by the addition of mass terms does not disturb off-shell finiteness to any order provided the sum of fermion masses equals the sum of ...
Nuclear Physics B, 1978
The implication of the rates ofuc and ep events observed at SLAC and DORIS on a choice between tw... more The implication of the rates ofuc and ep events observed at SLAC and DORIS on a choice between two alternative quark decay patterns are noted. If jets produced in e-e + annihilation contain liberated quarks, decaying predominantly into neutrinos + mesons, we would expect some 20 30% of energy to be carried away by neutrinos in calorimetric measurements, compared with ~12~ in case the quarks are confined. Pair production of quarks and gluons by hadrons could provide an abundant source of prompt neutrinos. Whether such a source, unavailable within confined QCD, is needed to account for the recently reported beam-dump results can be decided unambiguously once measurements of charm production are carried out adequately.
Pure and Applied Biology, 2013
The project was aimed to study the micronutrients status of some important sites of Kowga, distri... more The project was aimed to study the micronutrients status of some important sites of Kowga, district Buner. Soil samples were collected at a depth of 0-30 cm from 16 sites of Kowga district Buner and analyzed for AB-DTPA extractable Zn, Fe, Cu and Mn. The concentration of AB-DTPA extractable Zn, Fe, Cu and Mn ranged from 0.42-0.95, 0.57-4.02, 2.42-3.99 and 4.66-9.98mg kg-1 with an average of 0.61, 2.87, 3.16 and 6.81mg kg-1 respectively. 90 % samples were deficient in Zn while 10 % medium. 50 % samples were found deficient, 30 % medium and only 20% found adequate in Fe concentration. Mn and Cu concentration was found 100 % in soils, which showed that adequate levels of micronutrients in soils are important for optimum crop yield. Soil pH ranged from 7.97-8.35 with an average value of 8.2. All the soil samples had pH value above 8 except one which was 7.97. It showed that majority of the sites were alkaline in nature which shows that. Soil electrical conductivity (EC) ranged from 0.30-0.43dS m-1 which showed that soils were non saline, normal. Soil organic matter (SOM) ranged from 0.15 to 2.12% with an average value of 0.95 %. Lime content (CaCo 3) ranged from 7. 43 to 17.5 % with an average value of 11.94 %. According to criteria set by Rashid and Ahmad (1998), 15 samples were found deficient, while only one sample was in medium range. Fe; 10 soil samples collected were found low, 5 samples were in medium and 1 sample was in adequate iron concentration. The AB-DTPA extractable copper was found high in all the sites. The AB-DTPA extractable manganese was found high in all the sites.
The Journal of Chemical Physics, 2004
This study concerns the way to describe some physical properties of simple liquids by using the B... more This study concerns the way to describe some physical properties of simple liquids by using the Bogoliubov-Born-Green-Kirkwood-Yvon hierarchy. It constructively analyzes the recent contribution of Sarkisov [G. N. Sarkisov, J. Chem. Phys. 119, 373 (2003)] on the structural behavior of a simple fluid near the liquid-vapor critical point. His work, already compared with computer simulation studies, is here brought into direct contact for the heavier condensed rare gases Ar, Kr, and Xe with (a) experiment and (b) earlier theoretical investigations. Directions for future studies then emerge.
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Papers by 19MKT034 Abdus Salam