Level scheme of65Ga

Banerjee, P.; Sethi, B.; Chatterjee, M. B.; Goswami, R.

doi:10.1007/bf03185559

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…Clearly the corrections to the simple SU ( 5) relation for Yukawa and c matrices can be an order of magnitude. Nevertheless, in predictive SUSY GUTs the c matrices are obtained once the Fermion masses and mixing angles are fit (Kaplan and Schmaltz 1994, Babu and Mohapatra 1995, Frampton and Kong 1996, Lucas and Raby 1996, Allanach et al 1997, Barbieri and Hall 1997, Barbieri et al 1997, Blažek et al 1997, Berezhiani 1998 and Velasco-Sevilla 2003). In spite of the above cautionary remarks, we still find the inexact relations…”

mentioning

confidence: 66%

“…The more predictive the theory, the more testable it will be 10 . Within the context of the MSSM, theories have been constructed with U(1) family symmetries (Binetruy et al 1996, Elwood et al 1997, Faraggi and Pati 1998, Kakizaki and Yamaguchi 2002, Dreiner et al 2003, with discrete family symmetries (Frampton and Kephart 1995a, b, Hall and Murayama 1995, Carone and Lebed 1999, Frampton and Rasin 2000, Aranda et al 2000 or non-abelian family symmetries (Hall and Randall 1990, Pouliot and Seiberg 1993, Leurer et al 1993,1994, Pomarol and Tommasini 1995, Hall and Murayama 1995, Dudas et al 1995,1996, Barbieri et al 1996, Arkani-Hamed et al 1995,1996, Barbieri et al 1997, Eyal 1998). However, the most predictive theories combine both grand unified and family symmetries (Kaplan and Schmaltz 1994, Babu and Mohapatra 1995, Lucas and Raby 1996, Frampton and Kong 1996, Allanach et al 1997, Barbieri and Hall 1997, Barbieri et al 1997, Blažek et al 1997, Berezhiani 1998, Dermíšek and Raby 2000, Shafi and Tavartkiladze 2000, Albright and Barr 2000, Altarelli et al 2000, Berezhiani and Rossi 2001,...…”

Section: Fermion Mass Hierarchy and Family Symmetrymentioning

confidence: 99%

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Desperately seeking supersymmetry (SUSY)

Raby¹

2004

Rep. Prog. Phys.

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The discovery of X-rays and radioactivity in the waning years of the 19th century lead to one of the most awe inspiring scientific eras in human history. The 20th century witnessed a level of scientific discovery never before seen or imagined. At the dawn of the 20th century only two forces of Nature were known -gravity and electromagnetism. The atom was believed by chemists to be the elemental, indestructible unit of matter, coming in many unexplainably different forms. Yet J.J. Thomson, soon after the discovery of X-rays, had measured the charge to mass ratio of the electron, demonstrating that this carrier of electric current was ubiquitous and fundamental. All electrons could be identified by their unique charge to mass ratio.In the 20th century the mystery of the atom was unravelled, the atomic nucleus was smashed, and two new forces of Nature were revealed -the weak force [responsible for radioactive β decay and the nuclear fusion reaction powering the stars] and the nuclear force binding the nucleus. Quantum mechanics enabled the understanding of the inner structure of the atom, its nucleus and further inward to quarks and gluons [the building blocks of the nucleus] and thence outward to an understanding of large biological molecules and the unity of chemistry and microbiology.Finally the myriad of new fundamental particles, including electrons, quarks, photons, neutrinos, etc. and the three fundamental forces -electromagnetism, the weak and the strong nuclear force -found a unity of description in terms of relativistic quantum field theory. These three forces of Nature can be shown to be a consequence of symmetry rotations in internal spaces and the particular interactions of each particle are solely determined by their symmetry charge. This unifying structure, describing all the present experimental observations, is known as the standard model. Moreover, Einstein's theory of gravity can be shown to be a consequence of the symmetry of local translations and Lorentz transformations.As early as the 1970s, it became apparent that two new symmetries, a grand unified theory of the strong, weak and electromagnetic interactions in conjunction with supersymmetry, might unify all the known forces and particles into one unique structure. Now 30 years later, at the dawn of a new century, experiments are on the verge of discovering (or ruling out) these possible new symmetries of Nature. In this article we try to clarify why supersymmetry [ß] and supersymmetric grand unified theories [SUSY GUTs ] are the new standard model of particle physics, i.e. the standard by which all other theories and experiments are measured.

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