Ascertaining the spin for new resonances decaying into tau+ tau- at Hadron Colliders
Evidence of a new particle with mass ~125 GeV decaying into a pair of tau leptons at the Large Hadron Collider spurs interest in ascertaining its spin in this channel. Here we present a comparative study between spin-0 and spin-2 nature of this new particle, using spin correlations and decay product...
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| Veröffentlicht in: | arXiv.org 2012-12 |
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| creator | Banerjee, Swagato Kalinowski, Jan Kotlarski, Wojciech Przedzinski, Tomasz Was, Zbigniew |
| description | Evidence of a new particle with mass ~125 GeV decaying into a pair of tau leptons at the Large Hadron Collider spurs interest in ascertaining its spin in this channel. Here we present a comparative study between spin-0 and spin-2 nature of this new particle, using spin correlations and decay product directions. The TauSpinner algorithm is used to re-weight distributions from qqbar -> gamma/Z -> tau+ tau- sample to simulate a spin-2 state exchange. The method is based on supplementing the Standard Model matrix elements with those arising from presence of a new interaction. Studies with simulated samples demonstrate the discrimination power between these spin hypotheses based on data collected at the Large Hadron Collider. |
| doi_str_mv | 10.48550/arxiv.1212.2873 |
| format | Article |
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| subjects | Algorithms Comparative studies Computer simulation Large Hadron Collider Leptons Particle decay Particle spin Physics - High Energy Physics - Experiment Physics - High Energy Physics - Phenomenology Standard model (particle physics) Weight |
| title | Ascertaining the spin for new resonances decaying into tau+ tau- at Hadron Colliders |
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