| 研究課題/領域番号 |
14J05990
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| 研究機関 | 東京大学 |
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研究代表者 |
モラレス ロドリゲスパブロア 東京大学, 理学系研究科, 特別研究員(DC1)
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| 研究期間 (年度) |
2014-04-25 – 2017-03-31
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| キーワード | Quark Gluon Plasma / Heavy Ion Collisions / numerical simulation / particle production |
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| 研究実績の概要 |
For this academic year, I have engaged with two big topics regarding QCD under external fields.
One of the topics was to address the problem of particle production around the restoration of symmetry under an external gravitational field. In particular, the interest was focused on the mesonic sector of QCD including quantum fluctuations, in a cosmological background where curvature can be as large the characteristic scale. To engage on to this problem, first I started within an easier set up including only free particles in an expanding universe and observing the corresponding particle production rate as a function of curvature.
The other project I addressed is also along the line of particle production under external fields; namely fermion production under a background electromagnetic field. As a first step to this problem a step background electromagnetic field is considered although the final project involves a more realistic profile. When a pulsed magnetic field is taken into account in particular its parallel component, allows us to explore the CP-odd domain observing an asymmetry in the produced particle and antiparticle distributions resulting. I then succeeded at observing such imbalance as opposed to considering a perpendicular magnetic field. In addition the currents coming produced by the imbalanced of particles and antiparticles has also been simulated. The current goal is aimed at simulating this net particle production under external non-abelian electromagnetic fields.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
Regarding the first topic engaged, namely particle production around the phase transition in curved spaces, due to several difficulties along this out of equilibrium process specifically concerning numerical simulations, the project has momentarily been left on hold.
Afterwards, a project regarding a numerical simulation of particle production process in presence of an external field was set as another project. This, meant learning a new programming language and so progress was slow but steady. Finally after several consistency checks I have been able to recreate, (writing my own code from zero) a result consistent with the analytical expectation and that I hope publish soon and finally present a meaningful result to the heavy ion collision community by the upcoming quark matter conference this year.
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| 今後の研究の推進方策 |
There are several projects that I have in mind now that my numerical simulation code is running and stable. First, looking forward to the biggest conference in the field "Quark Matter 2015" I am aiming to address through numerical simulations how do flavour degrees of freedom appear at the formed quark gluon plasma in relativistic heavy ion collisions by considering now non-abelian background fields instead of the constant fields.
Second, try to observe through this simulations a realisation of the quark-plasma instability. All projects along the line of QCD under external fields.
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