Constraints on new physics from observing B hadrons at the large hadron collider

大型强子对撞机观测B强子对新物理学的限制

• 批准号: 228233-2008
• 负责人: Ahmady, Mohammad
• 金额: $ 1.09万
• 依托单位: Mount Allison University
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=425382
• 关键词: Constraints; new; physics; observing; hadrons

We are entering in a new era in particle physics as the Large Hadron Collider (LHC) will become operational in 2008. This is the most powerfull particle accelerator that has been constructed so far and has enormous discovery potentials. Protons are accelerated in this machine to close to the speed of light, made colliding with each other inside the detectors. The product of these very high energy collision are a large number of elementary particles that are heavy enough that require large energies to be produced. The hope is, through analyzing these particles we can trace some new particles that we have not seen before. This is the direct way of new particle discovery. My research proposal is about indirect methods of detecting new particles. As mentioned above, we can LHC is expected to produce a large number of heavy quarks known as b quarks. Therefore, we are able to observe even very rare decays of these quarks which have a small likelihood to happen. These rare decays are sometimes quite susceptible to the interference from much heavier particles that may be out there but have not been discovered yet. My proposed investigation is to have a better understanding of these interferences which can then be compared against the experimental data from LHC. This comparison will hopefully give us some clues on what is acceptable and what is not acceptable for unknown heavy particles. It is much easier to directly discover something when we know roughly where to look for it.

我们进入了粒子物理学的新时代，因为大型强子对撞机（LHC）将于2008年开始运行。这是迄今为止已经构建并具有巨大发现潜力的最强大的粒子加速器。 质子在这台计算机中加速以接近光速，使探测器内部相互碰撞。 这些非常高的能量碰撞的乘积是大量的基本颗粒，它们足够重，需要产生大能量。 希望是，通过分析这些粒子，我们可以追踪一些以前从未见过的新粒子。 这是新粒子发现的直接方式。 我的研究建议是关于检测新颗粒的间接方法。 如上所述，我们可以预计LHC会产生大量的重型夸克，称为B夸克。 因此，我们甚至能够观察到这些夸克的罕见衰变，这些夸克可能发生很小的可能性。 这些罕见的衰变有时很容易受到可能存在但尚未发现的较重颗粒的干扰。 我提出的研究是更好地了解这些干扰，然后将这些干扰与LHC的实验数据进行比较。 这种比较有望为我们提供一些有关可接受和未知重粒子不可接受的线索的线索。 当我们大致知道在哪里寻找它时，直接发现某些东西要容易得多。