Disentangling the spin-parity of a resonance via the gold-plated decay mode

Tanmoy Modak; Dibyakrupa Sahoo; Rahul Sinha; Hai-Yang Cheng; Tzu-Chiang Yuan

doi:10.1088/1674-1137/40/3/033002

Chinese Physics C> 2016, Vol. 40> Issue(3) : 033002 DOI: 10.1088/1674-1137/40/3/033002

Disentangling the spin-parity of a resonance via the gold-plated decay mode

1.
The Institute of Mathematical Sciences, Taramani, Chennai 600113
2.
Institute of Physics, Academia Sinica, Taipei, 11529

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Abstract：
Searching for new resonances and finding out their properties is an essential part of any existing or future particle physics experiment. The nature of a new resonance is characterized by its spin, charge conjugation, parity, and its couplings with the existing particles of the Standard Model. If a new resonance is found in the four lepton final state produced via two intermediate Z bosons, the resonance could be a new heavy scalar or a Z' boson or even a higher spin particle. In such cases a step by step methodology as enunciated in this paper can be followed to determine the spin, parity and the coupling to two Z bosons of the parent particles, in a fully model-independent way. In our approach we show how three uni-angular distributions and a few experimentally measurable observables can conclusively tell us about the spin, parity as well as the couplings of the new resonance to two Z bosons. We have performed a numerical analysis to validate our approach and showed how the uni-angular observables can be used to disentangle the spin parity as well as the coupling of the resonance.
- general spin-parity analysis ,
- angular distributions ,
- angular asymmetries

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Tanmoy Modak, Dibyakrupa Sahoo, Rahul Sinha, Hai-Yang Cheng and Tzu-Chiang Yuan. Disentangling the spin-parity of a resonance via the gold-plated decay mode[J]. Chinese Physics C, 2016, 40(3): 033002. doi: 10.1088/1674-1137/40/3/033002

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Received: 2015-09-01

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Supported in part by MOST (Taiwan)(103-2112-M-001-005 (HYC), 101-2112-M-001-005-MY3 (TCY))

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沈阳化工大学材料科学与工程学院沈阳 110142

Disentangling the spin-parity of a resonance via the gold-plated decay mode

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Disentangling the spin-parity of a resonance via the gold-plated decay mode

Corresponding author: Tanmoy Modak,

Corresponding author: Dibyakrupa Sahoo,

Corresponding author: Rahul Sinha,

Corresponding author: Hai-Yang Cheng,

Corresponding author: Tzu-Chiang Yuan,

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