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Worldsheet (anti)instanton bound states in type II on $T^2$

High Energy Physics - Theory · Submitted 6 Mar 2020

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

The authors' main claim We solve this eigenvalue equation to obtain the complete structure of the worldsheet (anti)instanton contributions.

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arXiv ID2003.03301 (version 2)
Pith IDQQZW563A, Pith's permanent record of this paper and its review
CitationAnirban Basu. "Worldsheet (anti)instanton bound states in type II on $T^2$." arXiv:2003.03301 (2020). https://pith.science/paper/QQZW563A
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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,530 input tokens.

What the abstract itself states, as probabilities: claims first 0.05 · states limitation 0.18 · human participants 0.01 · controlled comparison 0.08 · randomized assignment 0.01 · states quantitative result 0.17 · compares with prior results 0.80 · mentions code or data availability 0.02.

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

The 1/8 BPS $D^6\mathcal{R}^4$ coupling in type II string theory compactified on $T^2$ receives contributions from worldsheet instantons and anti-instantons wrapping the $T^2$, up to genus three in string perturbation theory. These involve contributions separately from bound states of instantons and anti-instantons, which are qualitatively similar to such contributions to the 1/2 and 1/4 BPS couplings. At genus two, the $D^6\mathcal{R}^4$ coupling also receives contributions from instanton/anti-instanton bound states unlike the 1/2 and 1/4 BPS couplings, which is a consequence of a T-duality invariant eigenvalue equation a term in the coupling satisfies. We solve this eigenvalue equation to obtain the complete structure of the worldsheet (anti)instanton contributions. In the type IIB theory, strong weak coupling duality leads to certain contributions involving bound states of D string (anti)instantons wrapping the $T^2$.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 The 1/8 BPS $D^6\mathcal{R}^4$ coupling in type II string theory compactified on $T^2$ receives contributions from worldsheet instantons and anti-instantons wrapping the $T^2$, up to genus three in string perturbation theory. background 0.48 0.25 0.16 asserted 1.00
s1 These involve contributions separately from bound states of instantons and anti-instantons, which are qualitatively similar to such contributions to the 1/2 and 1/4 BPS couplings. result 0.46 0.26 0.07 asserted 0.99
s2 At genus two, the $D^6\mathcal{R}^4$ coupling also receives contributions from instanton/anti-instanton bound states unlike the 1/2 and 1/4 BPS couplings, which is a consequence of a T-duality invariant eigenvalue equation a term in the coupling satisfies. result 0.81 0.39 0.29 asserted 1.00
s3 We solve this eigenvalue equation to obtain the complete structure of the worldsheet (anti)instanton contributions. method 0.46 0.95 0.31 asserted 1.00
s4 In the type IIB theory, strong weak coupling duality leads to certain contributions involving bound states of D string (anti)instantons wrapping the $T^2$. background 0.68 0.17 0.06 asserted 0.99

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

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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

The 1/8 BPS $D^6\mathcal{R}^4$ coupling in type II string theory compactified on $T^2$ receives contributions from worldsheet instantons and anti-instantons wrapping the $T^2$, up to genus three in string perturbation theory. These involve contributions separately from bound states of instantons and anti-instantons, which are qualitatively similar to such contributions to the 1/2 and 1/4 BPS couplings. At genus two, the $D^6\mathcal{R}^4$ coupling also receives contributions from instanton/anti-instanton bound states unlike the 1/2 and 1/4 BPS couplings, which is a consequence of a T-duality invariant eigenvalue equation a term in the coupling satisfies. We solve this eigenvalue equation to obtain the complete structure of the worldsheet (anti)instanton contributions. In the type IIB theory, strong weak coupling duality leads to certain contributions involving bound states of D string (anti)instantons wrapping the $T^2$.

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What this paper does with the arXiv papers it cites

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

What it cites · 19 sentences without a confident label

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  • Now using the relation ∑_n=1^∞_p (n) _q (n)/n^r = ζ(r)ζ(r-p)ζ(r-q)ζ(r-p-q)/ζ(2r -p-q),we see that F_0,2 (T_2) = ζ(3)ζ(5)/4πT_2^3+∑_n=1^∞Q_n (T_2) e^-4πn T_2.Thus from p and p1, we have that F_0 (T_2) = F_0,1 (T_2) + F_0,2 (T_2)in precise agreement with this result obtained using a different method in [ref] .

    The D^6 R^4 term in type IIB string theory on T^2 and U-duality · The solution for $I_n_1,n_2 (T_2)$ · 1.00

Cites as background 17 papers

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