Reconstruction of semileptonically decaying beauty hadrons produced in high energy pp collisions

被引：17

作者：

Ciezarek, G. ^{[1
]}

Lupato, A. ^{[2
]}

Rotondo, M. ^{[3
]}

Vesterinen, M. ^{[4
]}

机构：

[1] Nikhef, Sci Pk 105, NL-1098 XG Amsterdam, Netherlands

[2] INFN Padova, Viale Univ 2, I-35020 Legnaro, PD, Italy

[3] Lab Nazl Frascati, Via Enrico Fermi 40, I-00044 Frascati, RM, Italy

[4] Phys Inst Heidelberg, Neuenheimer Feld 226, D-69120 Heidelberg, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2017年 / 02期

关键词：

B physics; Flavor physics; Hadron-Hadron scattering (experiments);

D O I：

10.1007/JHEP02(2017)021

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

It is well known that in b-hadron decays with a single unreconstructible final state particle, the decay kinematics can be solved up to a quadratic ambiguity, without any knowledge of the b-hadron momentum. We present a method to infer the momenta of b-hadrons produced in hadron collider experiments using information from their reconstructed flight vectors. Our method is strictly agnostic to the decay itself, which implies that it can be validated with control samples of topologically similar decays to fully reconstructible final states. A multivariate regression algorithm based on the flight information provides a b-hadron momentum estimate with a resolution of around 60% which is sufficient to select the correct solution to the quadratic equation in around 70% of cases. This will improve the ability of hadron collider experiments to make differential decay rate measurements with semileptonic b-hadron decays.

引用

页数：17

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