Hyperon puzzle: hints from quantum Monte Carlo calculations

Physical Review Letters
Diego LonardoniF Pederiva

Abstract

The onset of hyperons in the core of neutron stars and the consequent softening of the equation of state have been questioned for a long time. Controversial theoretical predictions and recent astrophysical observations of neutron stars are the grounds for the so-called hyperon puzzle. We calculate the equation of state and the neutron star mass-radius relation of an infinite systems of neutrons and Λ particles by using the auxiliary field diffusion Monte Carlo algorithm. We find that the three-body hyperon-nucleon interaction plays a fundamental role in the softening of the equation of state and for the consequent reduction of the predicted maximum mass. We have considered two different models of three-body force that successfully describe the binding energy of medium mass hypernuclei. Our results indicate that they give dramatically different results on the maximum mass of neutron stars, not necessarily incompatible with the recent observation of very massive neutron stars. We conclude that stronger constraints on the hyperon-neutron force are necessary in order to properly assess the role of hyperons in neutron stars.

References

Apr 1, 1985·Physical Review C: Nuclear Physics·A R Bodmer, Q N Usmani
Jan 1, 1995·Physical Review C: Nuclear Physics·R B WiringaR Schiavilla
May 1, 1995·Physical Review C: Nuclear Physics·A A UsmaniQ N Usmani
Oct 1, 1995·Physical Review C: Nuclear Physics·A A Usmani
Aug 30, 1993·Physical Review Letters·J SchaffnerH Stöcker
May 29, 1995·Physical Review Letters·B S PudlinerR B Wiringa
Oct 26, 2002·Physical Review Letters·R B Wiringa, Steven C Pieper
May 17, 2008·Science·David J ChampionWouter Vlemmings
Sep 28, 2010·Physical Review Letters·E HiyamaT Motoba
Oct 29, 2010·Nature·P B DemorestJ W T Hessels
Jan 15, 2011·Physical Review Letters·S GandolfiSteven C Pieper
Apr 27, 2013·Science·John AntoniadisDavid G Whelan

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Citations

Feb 10, 2018·Reports on Progress in Physics·Gordon BaymTatsuyuki Takatsuka
Dec 4, 2015·Nature·Sofia Quaglioni
Nov 12, 2016·Physical Review Letters·Roland Wirth, Robert Roth
Oct 20, 2018·Proceedings. Mathematical, Physical, and Engineering Sciences·Isaac Vidaña
Oct 2, 2019·Physical Review Letters·S AcharyaUNKNOWN A Large Ion Collider Experiment Collaboration

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