QCD Light-Cone Sum Rule Estimate of Charming Penguin Contributions in B -> pi pi

A. Khodjamirian; B. Melic; Th. Mannel

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QCD Light-Cone Sum Rule Estimate of Charming Penguin Contributions in B -> pi pi

A. Khodjamirian, Th. Mannel, B. Melic

High Energy Physics - Phenomenology · Submitted 17 Apr 2003

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

The authors' main claim Our result indicates that sizable nonperturbative effects generated by charming penguins at finite m_b are absent.

how it is stated · hedged possibility 0.99 read the record →

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arXiv IDhep-ph/0304179 (version 2)

Pith IDGV45UHAQ, Pith's permanent record of this paper and its review

CitationA. Khodjamirian, B. Melic, Th. Mannel. "QCD Light-Cone Sum Rule Estimate of Charming Penguin Contributions in B -> pi pi." arXiv:hep-ph/0304179 (2003). https://pith.science/paper/GV45UHAQ

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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, 4,248 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.40 · human participants 0.01 · controlled comparison 0.07 · randomized assignment 0.01 · states quantitative result 0.15 · compares with prior results 0.36 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v2. Results and the main claim are underlined; show every role.

Employing the QCD light-cone sum rule approach we calculate the B -> pi pi hadronic matrix element of the current-current operator with c quarks in the penguin topology (``charming penguin''). The dominant contribution to the sum rule is due to the c-quark loop at short distances and is of O(alpha_s) with respect to the factorizable B -> pi pi amplitude. The effects of soft gluons are suppressed at least by O(alpha_s m_b^{-2}). Our result indicates that sizable nonperturbative effects generated by charming penguins at finite m_b are absent. The same is valid for the penguin contractions of the current-current operators with light quarks.

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	Employing the QCD light-cone sum rule approach we calculate the B -> pi pi hadronic matrix element of the current-current operator with c quarks in the penguin topology (``charming penguin'').	contribution 0.95	0.96	0.05	asserted 0.99
s1	The dominant contribution to the sum rule is due to the c-quark loop at short distances and is of O(alpha_s) with respect to the factorizable B -> pi pi amplitude.	result 0.95	0.82	0.10	asserted 1.00
s2	The effects of soft gluons are suppressed at least by O(alpha_s m_b^{-2}).	result 0.96	0.73	0.07	asserted 0.97
s3	Our result indicates that sizable nonperturbative effects generated by charming penguins at finite m_b are absent.	result 0.81	0.93	0.84	hedged possibility 0.99
s4	The same is valid for the penguin contractions of the current-current operators with light quarks.	result 0.86	0.68	0.09	asserted 1.00

What kind of paper the classifier reports this is: theoretical result 1.00 · evidence from proof or derivation 0.68.

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arXiv listing abstract v2

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references and citing 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

Employing the QCD light-cone sum rule approach we calculate the B -> pi pi hadronic matrix element of the current-current operator with c quarks in the penguin topology (``charming penguin''). The dominant contribution to the sum rule is due to the c-quark loop at short distances and is of O(alpha_s) with respect to the factorizable B -> pi pi amplitude. The effects of soft gluons are suppressed at least by O(alpha_s m_b^{-2}). Our result indicates that sizable nonperturbative effects generated by charming penguins at finite m_b are absent. The same is valid for the penguin contractions of the current-current operators with light quarks.

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References

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

Addressing the $S$-wave scalar $f_0(1500)$-resonance in quasi-four-body FCNC rare $B_s \to f_0(1500) (\to \pi^+ \pi^- ) \ell^+ \ell^- / \nu \bar \nu$ decays
hep-ph 2026-09 conditional novelty 6.0 of 10

First calculation of branching fractions for the quasi-four-body rare decays B_s to f0(1500) to π+π- and leptons or neutrinos, using light-cone sum rules and a novel light-cone distribution amplitude model.
$\Delta A_{CP}$ within the Standard Model and beyond
hep-ph 2019-03 conditional novelty 4.0 of 10

A conservative Standard Model bound of 3.6e-4 on the charm CP asymmetry leaves room for a sub-80-GeV Z-prime with a charm-up coupling near 1e-4 that reproduces the LHCb value while evading dijet, D-meson mixing, and Z...
Importance of Higher Twist Effects to Understand Charmed Color-Suppressed $B$ Decays
hep-ph 2006-02 conditional novelty 4.0 of 10

The nonfactorizable higher twist effect in \bar B^0 to D^{*0}\pi^0 is computed via LCSR and found to be of the same phase as, and comparable in size to, the factorizable amplitude.

How the literature uses it

11 arXiv papers cite this in 17 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 whose main result relates to this one's

Found among the papers closest to this one by title and main claim. Pith's classifier compared each pair's main results and a second model family confirmed the relation; checked against two further families, shown conflicts agreed 118 times in 120 and shown same results 218 times in 239. The quoted sentence is the other paper's main claim.

States the same result 1 paper

Our results indicate that charming penguins do not generate sizable nonperturbative effects at finite m_b.

Charming penguins in B -> pi pi from QCD light-cone sum rules · 0.97

Papers citing it · 15 sentences without a confident label

Uses its method or tool 1 paper

Furthermore, since we used analytical expressions from [ref] , certain terms of $O(s^π,K_0/m_D^2)$ are neglected, restoring them demands dedicated calculation.

QCD-based estimate of direct $CP$ asymmetry in charm decays · Results and discussion · 0.90

Cites it as background 1 paper

Whilst the latter are still challenging to compute on the lattice, modern techniques mainly build on the topological diagram decomposition [ref] , factorization methods [ref] , and the approximate flavour symmetry of the light quarks under strong interaction [ref] .[For other alternatives, we refer the readers to Refs. [ref] for light-cone sum rules, and [ref] for long-distance final-state interactions.

QCD-factorization amplitudes from flavour symmetries: beyond the $SU(3)$ symmetric case · Introduction · 0.86

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