The diphoton $$$$q_T$$$$ spectrum at N$$^3$$LL$$$$^\prime $$$$ + NNLO
Abstract
Abstract We present a $$$$q_T$$$$ -resummed calculation of diphoton production at order N $$^3$$ LL $$$$^\prime $$$$ + NNLO. To reach the primed level of accuracy we have implemented the recently published three-loop $$$${\mathcal {O}}(\alpha _s^3)$$$$ virtual corrections in the $$$$q\bar{q}$$$$ channel and the three-loop transverse momentum dependent beam functions and combined them with the existing infrastructure of , a code performing resummation at order N $$$${}^3$$$$ LL. While the primed predictions are parametrically not more accurate, one typically observes from lower orders and other processes that they are the dominant effect of the next order. We include in both the $$$$q\bar{q}$$$$ and loop-induced gg channel the hard contributions consistently together at order $$$$\alpha _s^3$$$$ and find that the resummed $$$$q\bar{q}$$$$ channel without matching stabilizes indeed. Due to large matching corrections and large contributions and uncertainties from the gg channel, the overall improvements are small though. We furthermore study the effect of hybrid-cone photon isolation and hard-scale choice on our fully matched results to describe the ATLAS $$$$\text {8}$$$$ TeV data and find that the hybrid-cone isolation worsens agreement at small $$$$q_T$$$$ compared to smooth-cone isolation.
- Authors:
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1825784
- Alternate Identifier(s):
- OSTI ID: 1830190
- Report Number(s):
- BNL-222374-2021-JAAM
Journal ID: ISSN 1434-6044; 905; PII: 9687
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Published Article
- Journal Name:
- European Physical Journal. C, Particles and Fields
- Additional Journal Information:
- Journal Name: European Physical Journal. C, Particles and Fields Journal Volume: 81 Journal Issue: 10; Journal ID: ISSN 1434-6044
- Publisher:
- Springer Science + Business Media
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; High Energy Physics; Phenomenology; Experiment
Citation Formats
Neumann, Tobias. The diphoton $$q_T$$ spectrum at N$$^3$$LL$$^\prime $$ + NNLO. Germany: N. p., 2021.
Web. doi:10.1140/epjc/s10052-021-09687-4.
Neumann, Tobias. The diphoton $$q_T$$ spectrum at N$$^3$$LL$$^\prime $$ + NNLO. Germany. https://doi.org/10.1140/epjc/s10052-021-09687-4
Neumann, Tobias. Thu .
"The diphoton $$q_T$$ spectrum at N$$^3$$LL$$^\prime $$ + NNLO". Germany. https://doi.org/10.1140/epjc/s10052-021-09687-4.
@article{osti_1825784,
title = {The diphoton $$q_T$$ spectrum at N$$^3$$LL$$^\prime $$ + NNLO},
author = {Neumann, Tobias},
abstractNote = {Abstract We present a $$q_T$$ q T -resummed calculation of diphoton production at order N $$^3$$ 3 LL $$^\prime $$ ′ + NNLO. To reach the primed level of accuracy we have implemented the recently published three-loop $${\mathcal {O}}(\alpha _s^3)$$ O ( α s 3 ) virtual corrections in the $$q\bar{q}$$ q q ¯ channel and the three-loop transverse momentum dependent beam functions and combined them with the existing infrastructure of , a code performing resummation at order N $${}^3$$ 3 LL. While the primed predictions are parametrically not more accurate, one typically observes from lower orders and other processes that they are the dominant effect of the next order. We include in both the $$q\bar{q}$$ q q ¯ and loop-induced gg channel the hard contributions consistently together at order $$\alpha _s^3$$ α s 3 and find that the resummed $$q\bar{q}$$ q q ¯ channel without matching stabilizes indeed. Due to large matching corrections and large contributions and uncertainties from the gg channel, the overall improvements are small though. We furthermore study the effect of hybrid-cone photon isolation and hard-scale choice on our fully matched results to describe the ATLAS $$\text {8}$$ 8 TeV data and find that the hybrid-cone isolation worsens agreement at small $$q_T$$ q T compared to smooth-cone isolation.},
doi = {10.1140/epjc/s10052-021-09687-4},
journal = {European Physical Journal. C, Particles and Fields},
number = 10,
volume = 81,
place = {Germany},
year = {Thu Oct 14 00:00:00 EDT 2021},
month = {Thu Oct 14 00:00:00 EDT 2021}
}
https://doi.org/10.1140/epjc/s10052-021-09687-4
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