2,141 research outputs found
Minimal Pati-Salam Model from String Theory Unification
We provide what we believe is the minimal three family SUSY
and conformal Pati-Salam Model from type IIB superstring theory. This
orbifolded AdS model has long lived protons and has potential
phenomenological consequences for LHC.Comment: 8 page
Long-Wavelength Modes of Cosmological Scalar Fields
We give a numerical analysis of long-wavelength modes in the WKB
approximation of cosmological scalar fields coupled to gravity via
. Massless fields are coupled conformally at .
Conformality can be preserved for fields of nonzero mass by shifting . We
discuss implications for density perturbations.Comment: 10 pages, 10 figures, several stylistic improvement
Primordial Black Holes, Hawking Radiation and the Early Universe
The 511 keV gamma emission from the galactic core may originate from a high
concentration () of primordial black holes (PBHs) in the core
each of whose Hawking radiation includes positrons per second.
The PBHs we consider are taken as near the lightest with longevity greater than
the age of the universe (mass kg; Schwarzschild radius
fm). These PBHs contribute only a small fraction of cold dark matter,
. This speculative hypothesis, if confirmed implies
the simultaneous discovery of Hawking radiation and an early universe phase
transition.Comment: 4 Page
Constraints on Deflation from the Equation of State of Dark Energy
In cyclic cosmology based on phantom dark energy the requirement that our
universe satisfy a CBE-condition ({\it Comes Back Empty}) imposes a lower bound
on the number of causal patches which separate just prior to
turnaround. This bound depends on the dark energy equation of state with . More accurate measurement of will
constrain . The critical density in the model has a lower
bound or
when the smallest bound state has size m, or m,
respectively.Comment: 23 pages, 3 figures, typos fixe
Mersenne Primes, Polygonal Anomalies and String Theory Classification
It is pointed out that the Mersenne primes and associated
perfect numbers play a significant role in string
theory; this observation may suggest a classification of consistent string
theories.Comment: 10 pages LaTe
Alfalfa Cultivar Yield Test for South Dakota: 1998 Report
The South Dakota Alfalfa Cultivar Yield Test reports relative forage production characteristics for available cultivars at several locations in South Dakota. Alfalfas are entered in the test by seed companies and public breeders at their own discretion. A list of the cultivars and the companies marketing them is at the end of this bulletin
SLOCC determinant invariants of order 2^{n/2} for even n qubits
In this paper, we study SLOCC determinant invariants of order 2^{n/2} for any
even n qubits which satisfy the SLOCC determinant equations. The determinant
invariants can be constructed by a simple method and the set of all these
determinant invariants is complete with respect to permutations of qubits.
SLOCC entanglement classification can be achieved via the vanishing or not of
the determinant invariants. We exemplify the method for several even number of
qubits, with an emphasis on six qubits.Comment: J. Phys. A: Math. Theor. 45 (2012) 07530
Cultivar Test in South Dakota, 1989 Report: Alfalfa Yields
Fifteen to 20 new alfalfa cultivars are released annually through public and commercial breeding programs. To select a cultivar for your operation, you will need information on forage yield, winterhardiness, and disease resistance. The alfalfa cultivar yield test of the Plant Science Department at SDSU determines relative forage production characteristics for available cultivars and experimental lines at several locations in South Dakota
Cultivar Test in South Dakota, 1988 Report: Alfalfa Yields
About 15 new alfalfa cultivars are released each year. Many of these cultivars are on the market, and you need to know their forage yields under South Dakota conditions before you can select one for your operation. Such yield information is given here for available cultivars and experimental lines at several locations in the state
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