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Setting Limits on Supersymmetry Using Simplified Models

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

Compact Stars with Sequential QCD Phase Transitions.

Mark Alford¹, Armen Sedrakian²

¹Department of Physics, Washington University, St. Louis, Missouri 63130, USA.

Physical Review Letters

|November 4, 2017

Summary

This summary is machine-generated.

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This study explores compact stars with two phase transitions, revealing a new family of denser hybrid stars. These models predict "twin" and "triplet" stars with identical masses but distinct radii.

Area of Science:

Astrophysics
Nuclear Physics
Particle Physics

Background:

Compact stars may harbor quark matter at extreme densities.
Understanding the internal composition of compact stars is crucial for astrophysics.

Purpose of the Study:

To investigate compact star models with two sequential first-order phase transitions.
To explore the possibility of new families of hybrid stars with distinct properties.

Main Methods:

Modeling compact stars with nuclear matter and two distinct quark matter phases.
Analyzing phase transitions from nuclear to two-flavor color-superconducting (2SC) and then to color-flavor-locked (CFL) phases.
Investigating the resulting mass-radius relationships and stability regions.

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Main Results:

The models predict two separate branches of hybrid stars, indicating a new family of denser compact stars.
Instability regions separate these branches from the nuclear branch.
The study demonstrates the possibility of "twin" and "triplet" compact stars, characterized by the same mass but different radii.

Conclusions:

The existence of two phase transitions in compact stars can lead to novel stellar structures.
These findings challenge existing models and suggest new observational targets for astronomers.
The concept of twin and triplet compact stars offers unique signatures for probing extreme physics within these objects.