Missing Momentum Reconstruction and Spin Measurements at Hadron Colliders

Hsin-Chia Cheng; Ian-Woo Kim; Lian-Tao Wang; Zhenyu Han

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Missing Momentum Reconstruction and Spin Measurements at Hadron Colliders

Hsin-Chia Cheng, Zhenyu Han, Ian-Woo Kim, Lian-Tao Wang

High Energy Physics - Phenomenology · Submitted 2 Aug 2010

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Unlike the methods relying on Lorentz invariant variables, this method can be used to determine the spin of the particle which initiates the decay chain.

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arXiv ID1008.0405 (version 3)

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CitationHsin-Chia Cheng, Ian-Woo Kim, Lian-Tao Wang, Zhenyu Han. "Missing Momentum Reconstruction and Spin Measurements at Hadron Colliders." arXiv:1008.0405 (2010). https://pith.science/paper/SYAWFWXS

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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,501 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.06 · states limitation 0.49 · human participants 0.01 · controlled comparison 0.05 · randomized assignment 0.01 · states quantitative result 0.04 · compares with prior results 0.81 · mentions code or data availability 0.02.

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arXiv listing abstract v3. Results and the main claim are underlined; show every role.

We study methods for reconstructing the momenta of invisible particles in cascade decay chains at hadron colliders. We focus on scenarios, such as SUSY and UED, in which new physics particles are pair produced. Their subsequent decays lead to two decay chains ending with neutral stable particles escaping detection. Assuming that the masses of the decaying particles are already measured, we obtain the momenta by imposing the mass-shell constraints. Using this information, we develop techniques of determining spins of particles in theories beyond the standard model. Unlike the methods relying on Lorentz invariant variables, this method can be used to determine the spin of the particle which initiates the decay chain. We present two complementary ways of applying our method by using more inclusive variables relying on kinematic information from one decay chain, as well as constructing correlation variables based on the kinematics of both decay chains in the same event.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We study methods for reconstructing the momenta of invisible particles in cascade decay chains at hadron colliders.	contribution 0.97	0.84	0.06	asserted 0.86
s1	We focus on scenarios, such as SUSY and UED, in which new physics particles are pair produced.	background 0.74	0.44	0.03	asserted 0.90
s2	Their subsequent decays lead to two decay chains ending with neutral stable particles escaping detection.	background 0.99	0.08	0.03	asserted 1.00
s3	Assuming that the masses of the decaying particles are already measured, we obtain the momenta by imposing the mass-shell constraints.	method 0.99	0.84	0.06	asserted 0.99
s4	Using this information, we develop techniques of determining spins of particles in theories beyond the standard model.	contribution 0.97	0.92	0.23	asserted 1.00
s5	Unlike the methods relying on Lorentz invariant variables, this method can be used to determine the spin of the particle which initiates the decay chain.	contribution 0.76	0.71	0.36	asserted 0.89
s6	We present two complementary ways of applying our method by using more inclusive variables relying on kinematic information from one decay chain, as well as constructing correlation variables based on the kinematics of both decay chains in the same event.	method 0.78	0.91	0.19	asserted 1.00

What kind of paper the classifier reports this is: method or tool 1.00 · evidence from proof or derivation 0.77.

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arXiv listing abstract v3

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full text
figures and tables
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T body sentences
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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

We study methods for reconstructing the momenta of invisible particles in cascade decay chains at hadron colliders. We focus on scenarios, such as SUSY and UED, in which new physics particles are pair produced. Their subsequent decays lead to two decay chains ending with neutral stable particles escaping detection. Assuming that the masses of the decaying particles are already measured, we obtain the momenta by imposing the mass-shell constraints. Using this information, we develop techniques of determining spins of particles in theories beyond the standard model. Unlike the methods relying on Lorentz invariant variables, this method can be used to determine the spin of the particle which initiates the decay chain. We present two complementary ways of applying our method by using more inclusive variables relying on kinematic information from one decay chain, as well as constructing correlation variables based on the kinematics of both decay chains in the same event.

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16 arXiv papers cite this in 20 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 12 sentences without a confident label

Cites it as background 6 papers

Here we shall be interested in hadron colliders like the LHC, where those methods would not be directly applicable. * Methods attempting either exact [ref] or approximate [ref] reconstruction of the kinematics of the invisible particles on an event by event basis.

Spin effects in the antler event topology at hadron colliders · Introduction and motivation · 0.88
The effectiveness of a number of kinematic observables for spin determination has also been studied [ref] .

Applying Machine Learning Techniques To Intermediate-Length Cascade Decays · Introduction · 0.91
For the DM spin determination, it has been studied for direct detection experiments in Ref. [ref] and collider experiments in Ref. [ref] .

Exploring properties of long-lived particles in inelastic dark matter models at Belle II · Introduction · 0.97

What it cites · 34 sentences without a confident label

Uses the method or tool of 1 paper

The events are generated with Herwig++ 2.4.2 [ref] at the parton level[Only the minimal UED is available in the official Herwig++ code.

Herwig++ Physics and Manual · Application to decay chains with photons · 0.98

Uses data or values from 1 paper

Therefore, we simply use the errors given in Ref. [ref] in our fit: [equation]

Accurate Mass Determinations in Decay Chains with Missing Energy · Application to sbottom/KK-bottom pair productions · 0.93

Cites as support 4 papers

In particular, for extended decay chains we consider in this article, the masses can be determined with a few percent errors using a few hundred events [ref] .

Reconstructing particle masses from pairs of decay chains · Introduction · 0.96
In particular, for extended decay chains we consider in this article, the masses can be determined with a few percent errors using a few hundred events [ref] .

Mass Determination in SUSY-like Events with Missing Energy · Introduction · 0.96
In particular, for extended decay chains we consider in this article, the masses can be determined with a few percent errors using a few hundred events [ref] .

Accurate Mass Determinations in Decay Chains with Missing Energy · Introduction · 0.96

Cites as background 25 papers

Event reconstruction has been considered for this event topology in Refs. [ref] .

Accurate Mass Determinations in Decay Chains with Missing Energy · Double Chain Techniques · 0.85
Event reconstruction has been considered for this event topology in Refs. [ref] .

Reconstructing particle masses from pairs of decay chains · Double Chain Techniques · 0.85
Many of the spin determination methods in the literature are based on this observation [ref] .

A General Method for Model-Independent Measurements of Particle Spins, Couplings and Mixing Angles in Cascade Decays with Missing Energy at Hadron Colliders · Introduction · 0.92

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