Abstract
In this paper we deal with radiation from heavy quarks in the context of next-to-leading order calculations matched to parton shower generators. A new algorithm for radiation from massive quarks is presented that has considerable advantages over the one previously employed. We implement the algorithm in the framework of the POWHEG-BOX, and compare it with the previous one in the case of the hvq generator for bottom production in hadronic collisions, and in the case of the bb4l generator for top production and decay.
Highlights
The production and detection of bottom quarks play an important rôle in various contexts in LHC physics
The purpose of the present paper is twofold: we present a new algorithm for radiation from a heavy quark, that has proven superior to the old one; we perform a thorough investigation of the behaviour of this component of the POWHEG generator, by comparing the two methods, both in the framework of bottom quarks generated in top decay, and in inclusive bottom quark pair production
In this paper we have presented a method for implementing radiation from a heavy quark in the POWHEG framework
Summary
The production and detection of bottom quarks play an important rôle in various contexts in LHC physics. There are reasons to give an adequate treatment to final state radiation from a high transverse momentum bottom quark This radiation process is intimately related to the physics of the bottom fragmentation function, and may have important effects in processes of considerable interest, like for example in top decay. The purpose of the present paper is twofold: we present a new algorithm for radiation from a heavy quark, that has proven superior to the old one; we perform a thorough investigation of the behaviour of this component of the POWHEG generator, by comparing the two methods, both in the framework of bottom quarks generated in top decay, and in inclusive bottom quark pair production. The paper is organized as follows: in Sect. 2 we describe the new algorithm, in Sect. 3 we illustrate our phenomenological studies, and in Sect. 4 we give our conclusions
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