Particle theory

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Extremely high energy cosmic rays from relic particle decays

(1998)

Authors:

Michael Birkel, Subir Sarkar
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Soliton solutions of M-theory on an orbifold

Physics Letters B Elsevier 425:1-2 (1998) 59-70

Authors:

Zygmunt Lalak, André Lukas, Burt A Ovrut
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Three-state complex valued spins coupled to binary branched polymers in two-dimensional quantum gravity

NUCL PHYS B-PROC SUP 63 (1998) 754-756

Authors:

JD Correia, JF Wheater

Abstract:

A model of complex spins (corresponding to a non-minimal model in the language of CFT) coupled to the binary branched polymer sector of quantum gravity is considered. We show that this leads to new behaviour.
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The Universe as a Domain Wall

(1998)

Authors:

Andre Lukas, Burt A Ovrut, KS Stelle, Daniel Waldram
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Quantifying uncertainties in primordial nucleosynthesis without Monte Carlo simulations

ArXiv astro-ph/9803177 (1998)

Authors:

G Fiorentini, E Lisi, Subir Sarkar, FL Villante

Abstract:

We present a simple method for determining the (correlated) uncertainties of the light element abundances expected from big bang nucleosynthesis, which avoids the need for lengthy Monte Carlo simulations. Our approach helps to clarify the role of the different nuclear reactions contributing to a particular elemental abundance and makes it easy to implement energy-independent changes in the measured reaction rates. As an application, we demonstrate how this method simplifies the statistical estimation of the nucleon-to-photon ratio through comparison of the standard BBN predictions with the observationally inferred abundances.
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