论文标题
$ b \ to k^{（\ ast）}ν\barν$
$B \to K^{(\ast)} ν\barν$ in covariant confined quark model
论文作者
论文摘要
我们通过使用美国开发的从协变量的Quark Quark Model（CCQM）获得的相关过渡形式差异来研究标准模型（SM）中$ B \ to K^{（\ ast）}ν\barν$衰变。 $ b \ to k $和$ b \ to k^\ ast $过渡形式要素是在整个运动学$ q^2 $范围内计算的。然后计算分支级分。结果表明，我们的结果与其他理论方法中获得的结果一致。目前，巴巴尔（Babar）和美女（Babar）的合作以90 \％的置信度限制为我们提供了上限。获得的边界大约比SM预测大的数量级。这应该刺激实验协作来设置实验，以使人们获得更准确的分支值，这在更新的LHCB和Belle机器上是可以实现的。如果确认理论与实验之间的差异，这将为建造具有新粒子和相互作用的模型的机会打开机会，从而导致SM扩展。
We study the $B \to K^{(\ast)} ν\barν$ decays within the Standard Model (SM) by using the relevant transition form factors obtained from the covariant confined quark model (CCQM) developed by us. The $B \to K$ and $B\to K^\ast$ transition form factors are calculated in the full kinematic $q^2$ range. The branching fractions are then calculated. It is shown that our results are in an agreement with those obtained in other theoretical approaches. Currently, the Babar and Belle collaborations provide us by the upper limits at 90\% confidence limit. The obtained bounds are roughly an order of magnitude larger than the SM predictions. This should stimulate experimental collaborations to set up experiments that allow one to obtain more accurate branching values, which is quite achievable on the updated LHCb and Belle machines. If the discrepancies between theory and experiment are confirmed, this will open up opportunities for constructing models with new particles and interactions leading to an extension of the SM.
