CP Violating Asymmetry in Stop Decay into Bottom and Chargino

Helmut Eberl; Sebastian M.R. Frank; Walter Majerotto

RECORD

CP Violating Asymmetry in Stop Decay into Bottom and Chargino

Helmut Eberl, Sebastian M.R. Frank, Walter Majerotto

High Energy Physics - Phenomenology · Submitted 23 Dec 2009

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

The authors' main claim Asymmetries up to 25 percent are obtained.

how it is stated · asserted 0.99 read the record →

Comment (0) Read on arXiv ↗

Cite ▾

arXiv ID0912.4675 (version 3)

Pith IDIRRQPUXH, Pith's permanent record of this paper and its review

CitationHelmut Eberl, Sebastian M.R. Frank, Walter Majerotto. "CP Violating Asymmetry in Stop Decay into Bottom and Chargino." arXiv:0912.4675 (2009). https://pith.science/paper/IRRQPUXH

Claim paper

The compiled record

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.

Open the compiled record

Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 6,011 input tokens, $0.0003 reported.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.51 · human participants 0.01 · controlled comparison 0.03 · randomized assignment 0.01 · states quantitative result 0.98 · compares with prior results 0.08 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

In the MSSM with complex parameters, loop corrections to the decay of a stop into a bottom quark and a chargino can lead to a CP violating decay rate asymmetry. We calculate this asymmetry at full one-loop level and perform a detailed numerical study, analyzing the dependence on the parameters and complex phases involved. If the stop can decay into a gluino, the self-energy and the vertex correction dominate due to the strong coupling. It is shown that the vertex contribution is always suppressed. We therefore give a simple approximate formula for the asymmetry. We account for the constraints on the parameters coming from several experimental limits. Asymmetries up to 25 percent are obtained. We also comment on the feasibility of measuring this asymmetry at the LHC.

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	In the MSSM with complex parameters, loop corrections to the decay of a stop into a bottom quark and a chargino can lead to a CP violating decay rate asymmetry.	background 0.94	0.15	0.32	hedged possibility 0.92
s1	We calculate this asymmetry at full one-loop level and perform a detailed numerical study, analyzing the dependence on the parameters and complex phases involved.	contribution 0.74	0.96	0.08	asserted 0.98
s2	If the stop can decay into a gluino, the self-energy and the vertex correction dominate due to the strong coupling.	result 0.52	0.31	0.05	asserted 0.51
s3	It is shown that the vertex contribution is always suppressed.	result 0.94	0.84	0.08	asserted 1.00
s4	We therefore give a simple approximate formula for the asymmetry.	contribution 0.60	0.94	0.12	asserted 0.98
s5	We account for the constraints on the parameters coming from several experimental limits.	method 0.74	0.88	0.03	asserted 0.99
s6	Asymmetries up to 25 percent are obtained.	result 1.00	0.94	0.49	asserted 0.99
s7	We also comment on the feasibility of measuring this asymmetry at the LHC.	interpretation 0.48	0.64	0.05	unclear 0.75

What kind of paper the classifier reports this is: theoretical result 0.96 · evidence from simulation or computation 0.94.

What was examined, and what was not

sources read

arXiv listing abstract v3

not examined

full text
figures and tables
references and citing sentences
relations to other papers

levels run

P abstract

not run

S sections
T body sentences
C citations
R cross-paper relations

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

In the MSSM with complex parameters, loop corrections to the decay of a stop into a bottom quark and a chargino can lead to a CP violating decay rate asymmetry. We calculate this asymmetry at full one-loop level and perform a detailed numerical study, analyzing the dependence on the parameters and complex phases involved. If the stop can decay into a gluino, the self-energy and the vertex correction dominate due to the strong coupling. It is shown that the vertex contribution is always suppressed. We therefore give a simple approximate formula for the asymmetry. We account for the constraints on the parameters coming from several experimental limits. Asymmetries up to 25 percent are obtained. We also comment on the feasibility of measuring this asymmetry at the LHC.

Human review

How Pith checks papers → · Full audit of this paper →

How the literature uses it

1 arXiv paper cite this in 1 sentence

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

Cites it as background 1 paper

Note that explicit couplings for $S_α=t̃_α, b̃_α$ in the CP-violating MSSM may be found, for example, in [ref] .

CP Violation in Correlated Production and Decay of Unstable Particles · Formalism for Scalar Particle Mixing · 0.90

What it cites · 24 sentences without a confident label

Uses the method or tool of 2 papers

The 47 one-loop contributions to $δ^CP$ were calculated by using [ref] .

Generating Feynman Diagrams and Amplitudes with FeynArts 3 · Numerical Results · 1.00
We use the one-loop integrals $B_0$, $C_0$, $C_1$, and $C_2$ according to the definition of [ref] in the convention of [ref] .

Techniques for the calculation of electroweak radiative corrections at the one-loop level and results for W-physics at LEP200 · CP Violating Contributions · 0.98

Uses data or values from 1 paper

In the calculation of $δ^CP$ we also take the Yukawa couplings $(h_t, h_b)$ running as given in the Appendix A of [ref] .

CP violation in charged Higgs decays in the MSSM · Numerical Results · 0.91

Cites as background 16 papers

Studies of measuring direct CP violation in stop cascade decays at the LHC based on T-odd asymmetries built from triple products were done in [ref] .

Probing SUSY CP Violation in Two-Body Stop Decays at the LHC · Introduction · 0.93
Studies of measuring direct CP violation in stop cascade decays at the LHC based on T-odd asymmetries built from triple products were done in [ref] .

Probing CP Violation with and without Momentum Reconstruction at the LHC · Introduction · 0.93
Studies of measuring direct CP violation in stop cascade decays at the LHC based on T-odd asymmetries built from triple products were done in [ref] .

Measurement of CP Violation in Stop Cascade Decays at the LHC · Introduction · 0.93

Discussion

Know something about this paper? Leave a comment, or highlight any passage above to comment on it.