Measuring New-Physics Parameters in B Penguin Decays

Alakabha Datta; David London

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Measuring New-Physics Parameters in B Penguin Decays

Alakabha Datta, David London

High Energy Physics - Phenomenology · Submitted 15 Apr 2004

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

The authors' main claim The knowledge of these parameters allows us to rule out many NP models and thus partially identify the new physics.

how it is stated · asserted 0.78 read the record →

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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, 6,725 input tokens, $0.0003 reported.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.64 · human participants 0.01 · controlled comparison 0.53 · randomized assignment 0.01 · states quantitative result 0.04 · compares with prior results 0.09 · mentions code or data availability 0.01.

The abstract, sentence by sentence

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

We examine new-physics (NP) effects in B decays with large b -> s penguin amplitudes. Decays involving b -> d penguins are assumed to be unaffected. We consider a model-independent parametrization of such NP. We argue that NP strong phases are negligible relative to those of the standard model. This allows us to describe the NP effects in terms of a small number of effective amplitudes A_NP^q (q=u,d,s,c) and corresponding weak phases Phi_q. We then consider pairs of neutral B decays which are related by flavour SU(3) in the standard model. One receives a large b -> s penguin component and has a NP contribution; the other has a b -> d penguin amplitude and is unaffected by NP. The time-dependent measurement of these two decays allows the {\it measurement} of the NP parameters A_NP^q and Phi_q. The knowledge of these parameters allows us to rule out many NP models and thus partially identify the new physics.

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 examine new-physics (NP) effects in B decays with large b -> s penguin amplitudes.	contribution 0.80	0.82	0.05	asserted 0.71
s1	Decays involving b -> d penguins are assumed to be unaffected.	limitation 0.42	0.16	0.03	asserted 0.91
s2	We consider a model-independent parametrization of such NP.	method 0.64	0.82	0.03	asserted 0.89
s3	We argue that NP strong phases are negligible relative to those of the standard model.	method 0.65	0.52	0.06	asserted 0.94
s4	This allows us to describe the NP effects in terms of a small number of effective amplitudes A_NP^q (q=u,d,s,c) and corresponding weak phases Phi_q.	method 0.88	0.73	0.08	asserted 0.93
s5	We then consider pairs of neutral B decays which are related by flavour SU(3) in the standard model.	method 0.85	0.71	0.02	asserted 0.93
s6	One receives a large b -> s penguin component and has a NP contribution; the other has a b -> d penguin amplitude and is unaffected by NP.	method 0.90	0.23	0.07	asserted 1.00
s7	The time-dependent measurement of these two decays allows the {\it measurement} of the NP parameters A_NP^q and Phi_q.	method 0.77	0.45	0.53	asserted 0.98
s8	The knowledge of these parameters allows us to rule out many NP models and thus partially identify the new physics.	interpretation 0.97	0.33	0.70	asserted 0.78

What kind of paper the classifier reports this is: method or tool 0.88 · evidence from argument 0.95.

What was examined, and what was not

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figures and tables
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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

We examine new-physics (NP) effects in B decays with large b -> s penguin amplitudes. Decays involving b -> d penguins are assumed to be unaffected. We consider a model-independent parametrization of such NP. We argue that NP strong phases are negligible relative to those of the standard model. This allows us to describe the NP effects in terms of a small number of effective amplitudes A_NP^q (q=u,d,s,c) and corresponding weak phases Phi_q. We then consider pairs of neutral B decays which are related by flavour SU(3) in the standard model. One receives a large b -> s penguin component and has a NP contribution; the other has a b -> d penguin amplitude and is unaffected by NP. The time-dependent measurement of these two decays allows the {\it measurement} of the NP parameters A_NP^q and Phi_q. The knowledge of these parameters allows us to rule out many NP models and thus partially identify the new physics.

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References

Forward citations

Cited by 4 Pith papers

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

Flavor Violations in $B$-Mesons within Non-Minimal SU(5)
hep-ph 2024-12 conditional novelty 6.0 of 10

A non-minimal SU(5) model with R2 leptoquark and S6 diquark is fitted to B-decay anomalies in b→cτν, B→Kπ, and B→Kνν, but the benchmark B→Kνν rate rises only about 3.5% above the Standard Model.
New Physics in $b \rightarrow s \mu^+ \mu^-$: Distinguishing Models through CP-Violating Effects
hep-ph 2017-03 conditional novelty 6.0 of 10

CP-violating asymmetries in B to K(*) mu mu, especially A7 at low dilepton mass, can in principle separate leptoquark explanations of the b to s mu mu anomalies from Z-prime explanations and from each other.
Next to Minimal Flavor Violation
hep-ph 2005-09 conditional novelty 5.0 of 10

Current B-factory data still allow new physics at a few TeV to contribute 30 to 40 percent of the Standard Model amplitude to B and K meson mixing, with arbitrary CP phase, so the flavor scale need not sit far above t...
New Physics in b -> s mu+ mu-: CP-Violating Observables
hep-ph 2011-03 conditional novelty 4.0 of 10

CP-violating observables in b -> s mu+ mu- decays respond almost exclusively to vector-axial vector new physics, with scalar and tensor operators contributing only at the sub-percent level.

How the literature uses it

13 arXiv papers cite this in 15 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 · 11 sentences without a confident label

Cites it as support 3 papers

Firstly, a large annihilation contribution to the $B→πK$ decays is an unexpected solution to the $B→πK$ puzzle, as the branching fractions do not favor a sizable annihilation amplitude [ref] which is also supported by model-independent $B→P P$ fits to available data [ref] .

A joint explanation of the $B\to \pi K$ puzzle and the $B \to K \nu \bar{\nu}$ excess · Addressing the B -> pi K puzzle with axion-like particles · 0.98
The NP strong phases involve only the (constrained) NP operators, and are therefore small [ref] .

New Physics in b -> s mu+ mu-: CP-Violating Observables · CP-violating effects · 0.96
We expect the strong phases associated with $T^ϕ$ and $C^ϕ$ to be very small [ref] as self-rescattering of these NP amplitudes is intrinsically feeble [ref] .

Flavor Violations in $B$-Mesons within Non-Minimal SU(5) · SU(5) diquark contributions to $$ · 0.98

Cites it as background 1 paper

There has been a lot of discussion about the possibility of new physics in nonleptonic $B$-decays (for example [ref] ).

Penguin Loops for Nonleptonic B-Decays in the Standard Model: Is there a Penguin Puzzle? · Penguins Contributions from New Physics · 0.99

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