String memories... openly retold

Aldi, Alice; Bianchi, Massimo; Firrotta, Maurizio

doi:10.1016/j.physletb.2020.136037

Cited by 20 publications

(13 citation statements)

References 42 publications

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“…Maybe write d for A m 15 Useful discussions of the DDF operators also include [100,101]. See also [102][103][104][105][106][107][108] for further applicatio a di↵erent approach to excited string scattering, see [109]. In what follows, we explicitly work out the form of these vertex operators, essentially revie the construction in [99,43].…”

Section: Building Excited Statesmentioning

confidence: 99%

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Chaotic scattering of highly excited strings

Gross

Rosenhaus

2021

J. High Energ. Phys.

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Motivated by the desire to understand chaos in the S-matrix of string theory, we study tree level scattering amplitudes involving highly excited strings. While the amplitudes for scattering of light strings have been a hallmark of string theory since its early days, scattering of excited strings has been far less studied. Recent results on black hole chaos, combined with the correspondence principle between black holes and strings, suggest that the amplitudes have a rich structure. We review the procedure by which an excited string is formed by repeatedly scattering photons off of an initial tachyon (the DDF formalism). We compute the scattering amplitude of one arbitrary excited string and any number of tachyons in bosonic string theory. At high energies and high mass excited state these amplitudes are determined by a saddle-point in the integration over the positions of the string vertex operators on the sphere (or the upper half plane), thus yielding a generalization of the “scattering equations”. We find a compact expression for the amplitude of an excited string decaying into two tachyons, and study its properties for a generic excited string. We find the amplitude is highly erratic as a function of both the precise excited string state and of the tachyon scattering angle relative to its polarization, a sign of chaos.

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Section: Building Excited Statesmentioning

confidence: 99%

“…Useful discussions of the DDF operators also include[99,100]. See also[101][102][103][104][105][106][107] for further applications.…”

mentioning

confidence: 99%

Chaotic scattering of highly excited strings

Gross

Rosenhaus

2021

J. High Energ. Phys.

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“…Other important features, such as the presence of echoes [1,13] for exotic compact objects (ECOs) or horizonless micro-states in the fuzz-ball proposal [14][15][16][17][18][19], and memory effects [20][21][22][23][24][25], based on soft theorems [26][27][28][29][30] have been investigated and precise characteristics have been identified that should allow to distinguish BHs from stringy fuzz-balls [31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Turning black-holes and D-branes inside out their photon-spheres

Bianchi,

Di Russo

2021

Preprint

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Very much as extremal Reissner-Nordstöm BHs, D3-branes and their intersecting bound-states in lower dimensions enjoy a remarkable symmetry under conformal inversions that exchange the horizon with infinity and keep the photon-sphere fixed. We explore the implications of this symmetry for the dynamics of massless and massive BPS particles. In particular we find a remarkable identity between the scattering angle of a probe impinging from infinity and the in-spiraling angle of a probe with the very same energy and angular momentum falling into the horizon from inside the photon-sphere. We argue for the identity of the radial actions and Shapiro time-delays for the two processes, when a cutoff regulator or an AdS ambient is adopted. We spell out the detailed conditions for the inversion symmetry to hold in the case of large BPS BHs in four dimensions. We address conformal inversions for other BHs and Dp-branes with photon-spheres in various dimensions with flat or AdS asymptotics. We briefly discuss the fate of the symmetry at the quantum level as well as for non spherically symmetric BHs and branes and sketch potential implications for the holographic correspondence.

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“…such possible α corrections on radiation energy flux predicted by string theory in BH mergings dubbed string memory effect [35][36][37][38].…”

Section: Jhep11(2021)193mentioning

confidence: 99%

Soft gravitational radiation from multi-body collisions

Addazi

Zeng

2021

J. High Energ. Phys.

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We derive a universal expression for the gravitational radiation energy spectrum dEGW/dω at sub-leading order emitted from a generic gravitational hard scattering of multi-particles or multi-bodies. Our result includes all $$ \mathcal{O} $$ O (ω) corrections to the gravitational radiation flux from a generic 2 → N collision, in both the cases of massless and massive particles/bodies. We also show the dependence of the radiation energy flux by the quantum spin in case of particle collisions. Then, we consider the specific case of a gravitational elastic scattering of two massive bodies, i.e. m + M → m + M with m, M the masses of the two bodies respectively. We demonstrate that in this case all $$ \mathcal{O} $$ O (ω) contributions to the energy flux exactly cancel each others. Nevertheless, we also show that, for a 2 → 2 inelastic scattering, the inclusion of sub-leading soft gravitons leads to a not zero radiation flux, having a simple expression in certain asymptotic regimes. Our results can be applied to the case of Black Hole collisions with possible testable implications in gravitational waves physics.

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String memories... openly retold

Cited by 20 publications

References 42 publications

Chaotic scattering of highly excited strings

Chaotic scattering of highly excited strings

Turning black-holes and D-branes inside out their photon-spheres

Soft gravitational radiation from multi-body collisions

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