Imaginary scaling invariance of the one-loop effective potential
Pith reviewed 2026-05-22 00:32 UTC · model grok-4.3
The pith
The r0 symmetry persists at one loop if the UV cutoff squared transforms non-trivially under it.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
It is concluded that the symmetry is present at the one-loop provided the UV cutoff squared transforms non-trivially under r0. The minimal model requires the presence of two real fields.
What carries the argument
The non-trivial transformation property assigned to the ultraviolet cutoff squared under the r0 symmetry, which keeps the one-loop effective potential invariant.
Load-bearing premise
The ultraviolet cutoff squared can be assigned a non-trivial transformation property under the r0 symmetry without violating other consistency requirements of the quantum field theory.
What would settle it
A direct computation of the one-loop effective potential in the r0-invariant two-Higgs doublet model that fails to remain invariant when the UV cutoff squared is transformed according to the required rule.
read the original abstract
Recently, a hitherto unknown class of renormalization group stable relations between parameters of bosonic field theories have been identified and dubbed as the r0 or 'GOOFy' symmetries. Here, one-loop properties of the r0 invariant two-Higgs Doublet Model and a minimal symmetric model are discussed. It is concluded that the symmetry is present at the one-loop provided the UV cutoff squared transforms non-trivially under r0. The minimal model requires the presence of two real fields.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The manuscript examines the one-loop effective potential in r0-symmetric bosonic theories, focusing on the two-Higgs-doublet model and a minimal model. It concludes that r0 invariance holds at one loop provided the UV cutoff squared transforms non-trivially under the r0 symmetry; the minimal model is stated to require two real scalar fields.
Significance. If the central claim is correct, the result would extend the recently identified r0 symmetries to the quantum level within a hard-cutoff regularization. This could offer new parameter relations in Higgs-sector models, but the non-trivial transformation assigned to the regulator raises questions about whether the invariance is intrinsic to the renormalized theory or an artifact of the chosen scheme.
major comments (2)
- [One-loop effective potential (section discussing the Coleman-Weinberg formula)] The central claim requires that quadratic and logarithmic cutoff terms in the Coleman-Weinberg potential compensate exactly under r0 when Λ² transforms non-trivially. The explicit one-loop integral expressions and the transformation rules for Λ² must be shown to achieve this cancellation without residual cutoff dependence after renormalization.
- [Discussion of regularization and renormalization] Physical observables must be regulator-independent after renormalization. Assigning a non-trivial r0 transformation to Λ² appears to tie the symmetry to the hard-cutoff scheme; the manuscript should demonstrate that the same invariance emerges in a scheme-independent manner (e.g., via dimensional regularization or after subtracting divergences).
minor comments (2)
- [Model definitions] Define the action of r0 on all fields and parameters explicitly, including how it acts on the two real scalars in the minimal model.
- [Results section] Clarify whether the reported one-loop results are obtained before or after renormalization-group improvement.
Simulated Author's Rebuttal
We thank the referee for the careful reading of our manuscript and the constructive comments. We address each major comment below and indicate the revisions we will make.
read point-by-point responses
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Referee: [One-loop effective potential (section discussing the Coleman-Weinberg formula)] The central claim requires that quadratic and logarithmic cutoff terms in the Coleman-Weinberg potential compensate exactly under r0 when Λ² transforms non-trivially. The explicit one-loop integral expressions and the transformation rules for Λ² must be shown to achieve this cancellation without residual cutoff dependence after renormalization.
Authors: We thank the referee for highlighting the need for explicit demonstration. The manuscript derives the one-loop effective potential in the hard-cutoff regularization and shows that the r0 symmetry is preserved when Λ² transforms non-trivially under the symmetry. In the revision we will expand the relevant section to display the explicit one-loop integral expressions for the quadratic and logarithmic terms together with the precise transformation rule assigned to Λ². This will make the exact cancellation manifest and confirm that no residual cutoff dependence survives in the renormalized potential. revision: yes
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Referee: [Discussion of regularization and renormalization] Physical observables must be regulator-independent after renormalization. Assigning a non-trivial r0 transformation to Λ² appears to tie the symmetry to the hard-cutoff scheme; the manuscript should demonstrate that the same invariance emerges in a scheme-independent manner (e.g., via dimensional regularization or after subtracting divergences).
Authors: We agree that physical observables must ultimately be regulator-independent. Our construction extends the r0 symmetry to act on the regulator itself, thereby preserving the symmetry at one loop within the hard-cutoff scheme. In the revised manuscript we will add a clarifying paragraph stating that the symmetry-induced relations among renormalized parameters remain intact once divergences are subtracted consistently with the symmetry. A full verification in dimensional regularization would require a separate definition of how the symmetry acts on the regulator in that scheme; such an extension lies beyond the scope of the present work, which focuses on the cutoff regularization where the symmetry is most directly realized. revision: partial
Circularity Check
Minor reference to prior r0 symmetry identification; one-loop extension adds independent content
full rationale
The paper takes the r0 symmetries as given from recent external identification and performs explicit one-loop calculations in the effective potential for the 2HDM and minimal model. The conclusion that invariance holds when the UV cutoff squared is assigned a non-trivial r0 transformation is presented as a conditional result of those calculations rather than a re-expression or fit of the input symmetry. No load-bearing step reduces by construction to a self-fit, self-citation chain, or ansatz smuggled from prior work by the same authors. The derivation remains self-contained against the stated assumptions and the explicit cutoff dependence in the Coleman-Weinberg potential.
Axiom & Free-Parameter Ledger
axioms (1)
- domain assumption r0 symmetries constitute a class of renormalization-group-stable relations between parameters of bosonic field theories
Lean theorems connected to this paper
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IndisputableMonolith/Foundation/AbsoluteFloorClosure.leanabsolute_floor_iff_bare_distinguishability unclear?
unclearRelation between the paper passage and the cited Recognition theorem.
It is concluded that the symmetry is present at the one-loop provided the UV cutoff squared transforms non-trivially under r0.
-
IndisputableMonolith/Foundation/AlexanderDuality.leanalexander_duality_circle_linking unclear?
unclearRelation between the paper passage and the cited Recognition theorem.
under the r0 transformation we have Λ²_UV → −Λ²_UV
What do these tags mean?
- matches
- The paper's claim is directly supported by a theorem in the formal canon.
- supports
- The theorem supports part of the paper's argument, but the paper may add assumptions or extra steps.
- extends
- The paper goes beyond the formal theorem; the theorem is a base layer rather than the whole result.
- uses
- The paper appears to rely on the theorem as machinery.
- contradicts
- The paper's claim conflicts with a theorem or certificate in the canon.
- unclear
- Pith found a possible connection, but the passage is too broad, indirect, or ambiguous to say the theorem truly supports the claim.
Forward citations
Cited by 1 Pith paper
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GOOFy fermions
New fermion transformations and all-order renormalization-invariant parameter regions are identified for two-Higgs-doublet models including scalar-fermion interactions.
Reference graph
Works this paper leans on
-
[1]
, m 2 22 − m2 11 = ( M0 , ⃗M) , (4) as well as the tensor arXiv:2506.21145v1 [hep-ph] 26 Jun 2025 2 Λµν = Λ00 ⃗Λ ⃗ΛT Λ = 1 2(λ1 + λ2) + λ3 −Re (λ6 + λ7) Im ( λ6 + λ7) 1 2(λ2 − λ1) −Re (λ6 + λ7) λ4 + Re (λ5) −Im (λ5) Re ( λ6 − λ7) Im (λ6 + λ7) −Im (λ5) λ4 − Re (λ5) −Im (λ6 − λ7) 1 2(λ2 − λ1) Re ( λ6 − λ7) −Im (λ6 − λ7) 1 2(λ1 + λ2) − λ3 . (5) I...
work page internal anchor Pith review Pith/arXiv arXiv 2025
-
[2]
+ m2 12ϕ1ϕ2 +1 2 λ1(ϕ4 1 + ϕ4
-
[3]
+ λ3(ϕ1ϕ2)2 +λ6(ϕ2 1 − ϕ2 2)ϕ1ϕ2 . (23) The model is invariant under the following r0-like trans- formation xµ → ixµ, ϕ 1 → iϕ2, ϕ 2 → −iϕ1 (24) It turns out that for this symmetric potential it is possi- ble to choose a (ϕ1, ϕ2) basis such that λ6 = 0. This is an analog of the statement proven for the 2HDM in [24, 25] where the authors showed that if λ1 ...
-
[4]
so there is a saddle point at ϕ1 = ϕ2 = 0 with two perpen- dicular directions of opposite curvature (a similar situ- ation appears in the r0-symmetric 2HDM where, at the origin, the Hessian has 4 positive and 4 negative eigen- values). This implies that there is a global minimum away from the origin and therefore the r0 symmetry is always spontaneously br...
-
[5]
One can also express the potential in terms of bilinear variables, r0 ≡ 1 2(ϕ2 1 + ϕ2
= −m2 1/λ1 and v1v2 = −m2 12/(λ1 + λ3) where ⟨ϕ1,2⟩ ≡ v1,2/ √ 2. One can also express the potential in terms of bilinear variables, r0 ≡ 1 2(ϕ2 1 + ϕ2
-
[6]
, r 1 ≡ ϕ1ϕ2 , r 2 ≡ 1 2(ϕ2 1 − ϕ2
-
[7]
(26) Note that r0, r1 and r2 are not independent: r2 0−r2 1−r2 2 =
-
[8]
Upon the r0 transformation, (r0, r1, r2) r0 − →(−r0, r1, r2) . (27) The r0 symmetry thus requires the coefficient of r0 in the potential to vanish, and the potential may be written as V (rµ) = −Mµrµ + Λµνrµrν , for µ, ν = 0 , 1, 2 with rµ ≡ (r0, r1, r2), M µ ≡ (0, m2 12, m2 1), the “Minkowski metric tensor” ηµν = diag(1, −1, −1) and Λµν ≡ Λ00 0 0 0 Λ ...
-
[9]
(30) Note that the eigenvalues of M2 S are linearly dependent on r0. It is easy to see that they transform under the r0 symmetry as M2 1 r0 − → −M2 2 and M2 2 r0 − → −M2 1 . (31) In order to illustrate explicitly the r0 invariance at the 1- loop level we present the 1-loop effective potential adopt- ing cut-off regularization and dropping irrelevant terms...
-
[10]
The counterterms have been chosen to contain only IR divergent ( M → 0) and/or the UV divergent (ΛUV → ∞ ) terms. After dropping irrelevant field-independent terms (even if they are divergent), the renormalized 1-loop effective potential reads V 1-loop eff (rµ) = V 0(r1, r2) + i 64π √∆0 M2 (3λ1 + λ3)(r2 1 + r2 2) + X i=1,2 M4 i (rµ) 64π log M2 i − 1 2 + ·...
-
[11]
+ 2λ3(m2 1 + m2 2) +6(λ6 + λ7)m2 12 (44) βm2 12 = 3( λ6m2 1 + λ7m2
-
[12]
It is clear that when the r0 sym- metry (24) is imposed βm2 1+m2 2 vanishes
+ 4λ3m2 12, (45) where, for pedagogical reasons, here we have kept m2 2 ̸= −m2 1 and λ6,7 ̸= 0. It is clear that when the r0 sym- metry (24) is imposed βm2 1+m2 2 vanishes. This was also verified at two loops in [2]. Therefore we conclude that the toy model constitutes the minimal model possessing the r0 symmetry. SUMMAR Y AND CONCLUSIONS In this letter w...
- [13]
- [14]
-
[15]
Trautner, Goofy is the new Normal , JHEP 10 (2025) 051 [ 2505.00099]
A. Trautner, Goofy is the new Normal, (2025), arXiv:2505.00099 [hep-ph]
-
[16]
A. Pilaftsis, Dirac algebra formalism for Two Higgs Dou- blet Models: The one-loop effective potential, Phys. Lett. B 860, 139147 (2025), arXiv:2408.04511 [hep-ph]
-
[17]
J. Velhinho, R. Santos, and A. Barroso, Tree level vac- uum stability in two Higgs doublet models, Phys. Lett. B322, 213 (1994)
work page 1994
-
[18]
Nagel, New aspects of gauge-boson couplings and the Higgs sector, Ph.D
F. Nagel, New aspects of gauge-boson couplings and the Higgs sector, Ph.D. thesis, Heidelberg U
-
[19]
I. P. Ivanov, Two-Higgs-doublet model from the group- theoretic perspective, Phys. Lett. B 632, 360 (2006), arXiv:hep-ph/0507132
work page internal anchor Pith review Pith/arXiv arXiv 2006
- [20]
-
[21]
I. P. Ivanov, Minkowski space structure of the Higgs po- tential in 2HDM. II. Minima, symmetries, and topology, Phys. Rev. D77, 015017 (2008), arXiv:0710.3490 [hep- ph]
work page internal anchor Pith review Pith/arXiv arXiv 2008
-
[22]
Stability and Symmetry Breaking in the General Two-Higgs-Doublet Model
M. Maniatis, A. von Manteuffel, O. Nachtmann, and F. Nagel, Stability and symmetry breaking in the gen- eral two-Higgs-doublet model, Eur. Phys. J. C48, 805 (2006), arXiv:hep-ph/0605184 [hep-ph]
work page internal anchor Pith review Pith/arXiv arXiv 2006
-
[23]
Determining the global minimum of Higgs potentials via Groebner bases - applied to the NMSSM
M. Maniatis, A. von Manteuffel, and O. Nachtmann, De- termining the global minimum of Higgs potentials via Groebner bases: Applied to the NMSSM, Eur. Phys. J. C 49, 1067 (2007), arXiv:hep-ph/0608314
work page internal anchor Pith review Pith/arXiv arXiv 2007
- [24]
-
[25]
C. C. Nishi, The Structure of potentials with N Higgs doublets, Phys. Rev. D76, 055013 (2007), arXiv:0706.2685 [hep-ph]
work page internal anchor Pith review Pith/arXiv arXiv 2007
-
[26]
C. C. Nishi, Physical parameters and basis transforma- tions in the Two-Higgs-Doublet model, Phys. Rev. D77, 055009 (2008), arXiv:0712.4260 [hep-ph]
work page internal anchor Pith review Pith/arXiv arXiv 2008
-
[27]
CP Violation in the General Two-Higgs-Doublet Model: a Geometric View
M. Maniatis, A. von Manteuffel, and O. Nachtmann, CP violation in the general two-Higgs-doublet model: A Geometric view, Eur. Phys. J. C57, 719 (2008), arXiv:0707.3344 [hep-ph]. 7
work page internal anchor Pith review Pith/arXiv arXiv 2008
-
[28]
Jackiw, Functional evaluation of the effective poten- tial, Phys
R. Jackiw, Functional evaluation of the effective poten- tial, Phys. Rev. D 9, 1686 (1974)
work page 1974
-
[29]
C. Itzykson and J. B. Zuber, Quantum Field Theory, In- ternational Series In Pure and Applied Physics (McGraw- Hill, New York, 1980)
work page 1980
-
[30]
Ramond, Field theory: a modern primer, Front
P. Ramond, Field theory: a modern primer, Front. Phys. 51 (1981)
work page 1981
- [31]
- [32]
-
[33]
M. Quiros, Finite temperature field theory and phase transitions, in ICTP Summer School in High-Energy Physics and Cosmology (1999) pp. 187–259, arXiv:hep- ph/9901312
-
[34]
If we had adopted dimensional regularization, the regu- larization scale µ2 would be found to be odd under the r0 transformation: µ2 → −µ2
-
[35]
B. Grzadkowski, talk ”Semisymmetries of Two-Higgs- doublet models” presented at the workshop ”New Physics Directions in the LHC era and beyond”, 23rd April, 2024, Heidelberg, Germany,
work page 2024
-
[36]
J. F. Gunion and H. E. Haber, Conditions for CP- violation in the general two-Higgs-doublet model, Phys. Rev. D 72, 095002 (2005), arXiv:hep-ph/0506227
work page internal anchor Pith review Pith/arXiv arXiv 2005
-
[37]
Basis-independent methods for the two-Higgs-doublet model
S. Davidson and H. E. Haber, Basis-independent meth- ods for the two-Higgs-doublet model, Phys. Rev. D 72, 035004 (2005), [Erratum: Phys.Rev.D 72, 099902 (2005)], arXiv:hep-ph/0504050
work page internal anchor Pith review Pith/arXiv arXiv 2005
-
[38]
E. J. Weinberg and A.-q. Wu, Understanding Complex Pertutrbative Effective Potentials, Phys. Rev. D36, 2474 (1987)
work page 1987
-
[39]
S. R. Coleman and E. J. Weinberg, Radiative Corrections as the Origin of Spontaneous Symmetry Breaking, Phys. Rev. D 7, 1888 (1973)
work page 1973
-
[40]
Two-loop Renormalization Group Equations in General Gauge Field Theories
M.-x. Luo, H.-w. Wang, and Y. Xiao, Two loop renormal- ization group equations in general gauge field theories, Phys. Rev. D 67, 065019 (2003), arXiv:hep-ph/0211440
work page internal anchor Pith review Pith/arXiv arXiv 2003
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