Search for flavor-changing neutral tqH interactions with H→γγ in pp collisions at √s = 13 TeV using the ATLAS detector

ATLAS Collaboration

doi:10.1007/JHEP12(2023)195

Search for flavor-changing neutral tqH interactions with H→γγ in pp collisions at √s = 13 TeV using the ATLAS detector

ATLAS Collaboration

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

A search for flavour-changing neutral interactions involving the top quark, the Higgs boson and an up-type quark q (q=c,u) is presented. The proton-proton collision data set used, with an integrated luminosity of 139 fb⁻¹, was collected at √s=13TeV by the ATLAS experiment at the Large Hadron Collider. Both the decay process t→qH and the production process pp→tH, with the Higgs boson decaying into two photons, are investigated. No significant excess is observed and upper limits are set on the t→cH and the t→uH branching ratios of 4.3×10⁻⁴ and 3.8×10⁻⁴, respectively, at the 95% confidence level, while the expected limits in the absence of signal are 4.7×10⁻⁴ and 3.9×10⁻⁴. Combining this search with ATLAS searches in the H→τ⁺τ⁻ and H→bb¯ final states yields observed (expected) upper limits on the t→cH branching ratio of 5.8×10⁻⁴ (3.0×10⁻⁴) at the 95% confidence level. The corresponding observed (expected) upper limit on the t→uH branching ratio is 4.0×10⁻⁴ (2.4×10⁻⁴)

Original language	English
Article number	195
Number of pages	52
Journal	JHEP
Volume	2023
Issue number	12
DOIs	https://doi.org/10.1007/JHEP12(2023)195
Publication status	Published - 28 Dec 2023

Bibliographical note

Acknowledgments:
We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently.

We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRI, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DSI/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TENMAK, Türkiye; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada and CRC, Canada; PRIMUS 21/SCI/017 and UNCE SCI/013, Czech Republic; COST, ERC, ERDF, Horizon 2020, ICSC-NextGenerationEU and Marie Skłodowska-Curie Actions, European Union; Investissements d’Avenir Labex, Investissements d’Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and MINERVA, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN and NAWA, Poland; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Göran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom.

The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (U.K.) and BNL (U.S.A.), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in ref. [104].

Keywords

Flavour Changing Neutral Currents
Hadron-Hadron Scattering
Higgs Physics
Top Physics

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Cite this

@article{3b272fec59584936bf907f6ed7cf492f,

title = "Search for flavor-changing neutral tqH interactions with H→γγ in pp collisions at √s = 13 TeV using the ATLAS detector",

abstract = "A search for flavour-changing neutral interactions involving the top quark, the Higgs boson and an up-type quark q (q=c,u) is presented. The proton-proton collision data set used, with an integrated luminosity of 139 fb−1, was collected at √s=13TeV by the ATLAS experiment at the Large Hadron Collider. Both the decay process t→qH and the production process pp→tH, with the Higgs boson decaying into two photons, are investigated. No significant excess is observed and upper limits are set on the t→cH and the t→uH branching ratios of 4.3×10−4 and 3.8×10−4, respectively, at the 95% confidence level, while the expected limits in the absence of signal are 4.7×10−4 and 3.9×10−4. Combining this search with ATLAS searches in the H→τ+τ− and H→bb¯ final states yields observed (expected) upper limits on the t→cH branching ratio of 5.8×10−4 (3.0×10−4) at the 95% confidence level. The corresponding observed (expected) upper limit on the t→uH branching ratio is 4.0×10−4 (2.4×10−4)",

keywords = "Flavour Changing Neutral Currents, Hadron-Hadron Scattering, Higgs Physics, Top Physics",

author = "{ATLAS Collaboration} and Allport, {P. P.} and Auriol, {A. D.} and P. Bellos and Bird, {G. A.} and J. Bracinik and Charlton, {D. G.} and Chisholm, {A. S.} and George, {W. F.} and L. Gonella and Hawkes, {C. M.} and K. Krizka and Lomas, {J. D.} and M. Marinescu and Newman, {P. R.} and K. Nikolopoulos and {Cardoso Silva}, {J. M.} and E. Skorda and A. Stampekis and Thomas, {J. P.} and Thompson, {P. D.} and Ward, {R. J.} and Watson, {A. T.} and Watson, {M. F.} and C. Wu",

note = "Acknowledgments: We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRI, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZ{\v S}, Slovenia; DSI/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TENMAK, T{\"u}rkiye; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada and CRC, Canada; PRIMUS 21/SCI/017 and UNCE SCI/013, Czech Republic; COST, ERC, ERDF, Horizon 2020, ICSC-NextGenerationEU and Marie Sk{\l}odowska-Curie Actions, European Union; Investissements d{\textquoteright}Avenir Labex, Investissements d{\textquoteright}Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and MINERVA, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN and NAWA, Poland; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; G{\"o}ran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (U.K.) and BNL (U.S.A.), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in ref. [104].",

year = "2023",

month = dec,

day = "28",

doi = "10.1007/JHEP12(2023)195",

language = "English",

volume = "2023",

journal = "JHEP",

issn = "1126-6708",

publisher = "Springer",

number = "12",

}

TY - JOUR

T1 - Search for flavor-changing neutral tqH interactions with H→γγ in pp collisions at √s = 13 TeV using the ATLAS detector

AU - ATLAS Collaboration

AU - Allport, P. P.

AU - Auriol, A. D.

AU - Bellos, P.

AU - Bird, G. A.

AU - Bracinik, J.

AU - Charlton, D. G.

AU - Chisholm, A. S.

AU - George, W. F.

AU - Gonella, L.

AU - Hawkes, C. M.

AU - Krizka, K.

AU - Lomas, J. D.

AU - Marinescu, M.

AU - Newman, P. R.

AU - Nikolopoulos, K.

AU - Cardoso Silva, J. M.

AU - Skorda, E.

AU - Stampekis, A.

AU - Thomas, J. P.

AU - Thompson, P. D.

AU - Ward, R. J.

AU - Watson, A. T.

AU - Watson, M. F.

AU - Wu, C.

N1 - Acknowledgments: We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRI, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DSI/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TENMAK, Türkiye; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada and CRC, Canada; PRIMUS 21/SCI/017 and UNCE SCI/013, Czech Republic; COST, ERC, ERDF, Horizon 2020, ICSC-NextGenerationEU and Marie Skłodowska-Curie Actions, European Union; Investissements d’Avenir Labex, Investissements d’Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and MINERVA, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN and NAWA, Poland; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Göran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (U.K.) and BNL (U.S.A.), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in ref. [104].

PY - 2023/12/28

Y1 - 2023/12/28

N2 - A search for flavour-changing neutral interactions involving the top quark, the Higgs boson and an up-type quark q (q=c,u) is presented. The proton-proton collision data set used, with an integrated luminosity of 139 fb−1, was collected at √s=13TeV by the ATLAS experiment at the Large Hadron Collider. Both the decay process t→qH and the production process pp→tH, with the Higgs boson decaying into two photons, are investigated. No significant excess is observed and upper limits are set on the t→cH and the t→uH branching ratios of 4.3×10−4 and 3.8×10−4, respectively, at the 95% confidence level, while the expected limits in the absence of signal are 4.7×10−4 and 3.9×10−4. Combining this search with ATLAS searches in the H→τ+τ− and H→bb¯ final states yields observed (expected) upper limits on the t→cH branching ratio of 5.8×10−4 (3.0×10−4) at the 95% confidence level. The corresponding observed (expected) upper limit on the t→uH branching ratio is 4.0×10−4 (2.4×10−4)

AB - A search for flavour-changing neutral interactions involving the top quark, the Higgs boson and an up-type quark q (q=c,u) is presented. The proton-proton collision data set used, with an integrated luminosity of 139 fb−1, was collected at √s=13TeV by the ATLAS experiment at the Large Hadron Collider. Both the decay process t→qH and the production process pp→tH, with the Higgs boson decaying into two photons, are investigated. No significant excess is observed and upper limits are set on the t→cH and the t→uH branching ratios of 4.3×10−4 and 3.8×10−4, respectively, at the 95% confidence level, while the expected limits in the absence of signal are 4.7×10−4 and 3.9×10−4. Combining this search with ATLAS searches in the H→τ+τ− and H→bb¯ final states yields observed (expected) upper limits on the t→cH branching ratio of 5.8×10−4 (3.0×10−4) at the 95% confidence level. The corresponding observed (expected) upper limit on the t→uH branching ratio is 4.0×10−4 (2.4×10−4)

KW - Flavour Changing Neutral Currents

KW - Hadron-Hadron Scattering

KW - Higgs Physics

KW - Top Physics

U2 - 10.1007/JHEP12(2023)195

DO - 10.1007/JHEP12(2023)195

M3 - Article

SN - 1126-6708

VL - 2023

JO - JHEP

JF - JHEP

IS - 12

M1 - 195

ER -

Search for flavor-changing neutral tqH interactions with H→γγ in pp collisions at √s = 13 TeV using the ATLAS detector

Abstract

Bibliographical note

Keywords

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