论文标题
$^{3} \ OVERLINE的测量
Measurement of of $^{3}\overline{\rm He}$ nuclei absorption in matter and impact on their propagation in the galaxy
论文作者
论文摘要
在我们的星系中，可以通过高能宇宙射线与星际培养基碰撞产生由抗蛋白酶和抗肿瘤组成的光反核，或者也可能源自尚未发现的深色 - 深色颗粒的歼灭。在地球上，以高精度生产和研究抗核心的唯一方法是在高能粒子加速器上创建它们。尽管已经详细研究了基本反粒子的特性，但对光反核与物质相互作用的相互作用的了解有限。我们确定$^{3} \ edline {\ rm He} $的消失概率当它遇到物质粒子并在大型强子对撞机的爱丽丝探测器中歼灭或分解。我们提取非弹性相互作用横截面，然后将其用作输入，以计算我们银河系的透明度，以$^{3} \叠加{\ rm he} $的传播，这些{\ rm he} $源自星际介质内的深色灭绝和宇宙射线相互作用。对于特定的深色 - 物种概况，我们估计透明度约为50％，而随着$^{3} \ Overline {\ rm He} $动量的增加，宇宙射线来源的差异从25％到90％。结果表明，$^{3} \ edline {\ rm he} $ nuclei可以在银河系中长距离行驶，可用于研究宇宙射线相互作用和深色 - 强度的歼灭。
In our Galaxy, light antinuclei composed of antiprotons and antineutrons can be produced through high-energy cosmic-ray collisions with the interstellar medium or could also originate from the annihilation of dark-matter particles that have not yet been discovered. On Earth, the only way to produce and study antinuclei with high precision is to create them at high-energy particle accelerators. Although the properties of elementary antiparticles have been studied in detail, the knowledge of the interaction of light antinuclei with matter is limited. We determine the disappearance probability of $^{3}\overline{\rm He}$ when it encounters matter particles and annihilates or disintegrates within the ALICE detector at the Large Hadron Collider. We extract the inelastic interaction cross section, which is then used as input to calculations of the transparency of our Galaxy to the propagation of $^{3}\overline{\rm He}$ stemming from dark-matter annihilation and cosmic-ray interactions within the interstellar medium. For a specific dark-matter profile, we estimate a transparency of about 50%, whereas it varies with increasing $^{3}\overline{\rm He}$ momentum from 25% to 90% for cosmic-ray sources. The results indicate that $^{3}\overline{\rm He}$ nuclei can travel long distances in the Galaxy, and can be used to study cosmic-ray interactions and dark-matter annihilation.
