期刊
PHYSICS LETTERS B
卷 700, 期 2, 页码 126-132出版社
ELSEVIER
DOI: 10.1016/j.physletb.2011.04.068
关键词
Combinatorial ambiguity; Transverse momentum; Invariant mass; Mass reconstruction; Missing energy
资金
- LHC Theory Initiative
- NSF [PHY-0705682, PHY-0653656, PHY-0970173]
- Direct For Mathematical & Physical Scien [970173] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [705682] Funding Source: National Science Foundation
- Division Of Physics [970173] Funding Source: National Science Foundation
We present a new method for resolving combinatorial ambiguities that arise in multi-particle decay chains at hadron colliders where the assignment of visible particles to the different decay chains has ambiguities. Our method, based on selection cuts favoring high transverse momentum and low invariant mass pairings, is shown to be significantly superior to the more traditional hemisphere method for a large class of decay chains, producing an increase in signal retention of up to a factor of 2. This new method can thus greatly reduce the combinatorial ambiguities of decay chain assignments. (C) 2011 Elsevier B.V. All rights reserved.
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