Jet Like Distributions From the Weak Decay of Heavy Quarks

Ali, Ahmed; Kramer, G.; Korner, J. G.; Willrodt, J.

doi:10.1007/BF01445412

Report/Internal Report

PUBDB-2017-12716

Jet Like Distributions From the Weak Decay of Heavy Quarks

Ali, A.Extern* ; Korner, J. G. ; Kramer, G.Extern* ; Willrodt, J.DESY*

1978

(1979) [10.1007/BF01445412]

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Please use a persistent id in citations: doi:10.1007/BF01445412 doi:10.3204/PUBDB-2017-12716

Report No.: DESY-78-047

Abstract: We consider the production and weak decay of a pair of heavy quarks (mesons) ine+e− experiments and study their effect on the various jet distributions. The relative magnitudes of the two-quark-jet and three-quark-jet final states, in the decay of a heavy quark are estimated in the framework of an SU(2)L×U(1) model. We find that the three quark configuration dominates over the two quark configuration. For the quark jets resulting from the weak decay of the heavy quarks, we calculate the jet distributions in Sphericity, Spherocity and Thrust for the process\(e^ +e^ -\to Q\bar Q \to 6\) quarks. These distributions are compared with the corresponding quantities from the non-perturbative process\(e^ +e^ -\to q\bar q\) and the QCD process\(e^ +e^ -\to q\bar qg\). We find that the weak decay of heavy quarks is the dominant mechanism for jet broadening ine+e− experiments, in the intermediate energy region relevant for PETRA and PEP.

Keyword(s): ELECTRON POSITRON: ANNIHILATION ; ANNIHILATION: ELECTRON POSITRON ; MODEL: JET ; heavy quark ; QUARK: PAIR PRODUCTION ; PAIR PRODUCTION: QUARK ; QUARK: DECAY ; DECAY: QUARK ; DECAY: WEAK INTERACTION ; GAUGE FIELD THEORY: SU(2) X U(1) ; FINAL STATE: (2JET) ; FINAL STATE: (3JET) ; TRANSVERSE MOMENTUM: JET ; POSTULATED PARTICLE: BEAUTY MESON ; LEPTONIC DECAY: BEAUTY MESON ; SEMILEPTONIC DECAY: BEAUTY MESON ; NONLEPTONIC DECAY: BEAUTY MESON ; LIFETIME: BEAUTY MESON ; RATIO: DECAY WIDTH ; DIFFERENTIAL CROSS SECTION: SPHERICITY ; DIFFERENTIAL CROSS SECTION: THRUST ; ENERGY DEPENDENCE ; UP TO 200 GEV-CM