Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at root s=8 TeV
2015
Аутори
Khachatryan, V.Adžić, Petar
Ekmedžić, Marko
Milošević, Jovan
Meglić, Katarina
Đorđević, Miloš
Milenović, Predrag
CMS Collaboration (ukupan broj autora: 2147)
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
A search is performed for long-lived massive neutral particles decaying to quark-antiquark pairs. The experimental signature is a distinctive topology of a pair of jets, originating at a secondary vertex. Events were collected with the CMS detector at the CERN LHC in proton-proton collisions at a center-of-mass energy of 8 TeV. The data analyzed correspond to an integrated luminosity of 18.5 fb(-1). No significant excess is observed above standard model expectations. Upper limits at 95% confidence level are set on the production cross section of a heavy neutral scalar particle, H, in the mass range of 200 to 1000 GeV, decaying promptly into a pair of long-lived neutral X particles in the mass range of 50 to 350 GeV, each in turn decaying into a quark-antiquark pair. For X with mean proper decay lengths of 0.4 to 200 cm, the upper limits are typically 0.5-200 fb. The results are also interpreted in the context of an R-parity-violating supersymmetric model with long-lived neutralinos dec...aying into a quark-antiquark pair and a muon. For pair production of squarks that promptly decay to neutralinos with mean proper decay lengths of 2-40 cm, the upper limits on the cross section are typically 0.5-3 fb. The above limits are the most stringent on these channels to date.
Извор:
Physical Review D, 2015, 91, 1Финансирање / пројекти:
- BMWFW, FWF (Austria), FNRS (Belgium), FWO (Belgium), CNPq, CAPES, FAPERJ, FAPESP (Brazil)
DOI: 10.1103/PhysRevD.91.012007
ISSN: 1550-7998; 1550-2368
WoS: 000348329000001
Scopus: 2-s2.0-84921459273
Колекције
Институција/група
VinčaTY - JOUR AU - Khachatryan, V. AU - Adžić, Petar AU - Ekmedžić, Marko AU - Milošević, Jovan AU - Meglić, Katarina AU - Đorđević, Miloš AU - Milenović, Predrag PY - 2015 UR - https://vinar.vin.bg.ac.rs/handle/123456789/366 AB - A search is performed for long-lived massive neutral particles decaying to quark-antiquark pairs. The experimental signature is a distinctive topology of a pair of jets, originating at a secondary vertex. Events were collected with the CMS detector at the CERN LHC in proton-proton collisions at a center-of-mass energy of 8 TeV. The data analyzed correspond to an integrated luminosity of 18.5 fb(-1). No significant excess is observed above standard model expectations. Upper limits at 95% confidence level are set on the production cross section of a heavy neutral scalar particle, H, in the mass range of 200 to 1000 GeV, decaying promptly into a pair of long-lived neutral X particles in the mass range of 50 to 350 GeV, each in turn decaying into a quark-antiquark pair. For X with mean proper decay lengths of 0.4 to 200 cm, the upper limits are typically 0.5-200 fb. The results are also interpreted in the context of an R-parity-violating supersymmetric model with long-lived neutralinos decaying into a quark-antiquark pair and a muon. For pair production of squarks that promptly decay to neutralinos with mean proper decay lengths of 2-40 cm, the upper limits on the cross section are typically 0.5-3 fb. The above limits are the most stringent on these channels to date. T2 - Physical Review D T1 - Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at root s=8 TeV VL - 91 IS - 1 DO - 10.1103/PhysRevD.91.012007 ER -
@article{ author = "Khachatryan, V. and Adžić, Petar and Ekmedžić, Marko and Milošević, Jovan and Meglić, Katarina and Đorđević, Miloš and Milenović, Predrag", year = "2015", abstract = "A search is performed for long-lived massive neutral particles decaying to quark-antiquark pairs. The experimental signature is a distinctive topology of a pair of jets, originating at a secondary vertex. Events were collected with the CMS detector at the CERN LHC in proton-proton collisions at a center-of-mass energy of 8 TeV. The data analyzed correspond to an integrated luminosity of 18.5 fb(-1). No significant excess is observed above standard model expectations. Upper limits at 95% confidence level are set on the production cross section of a heavy neutral scalar particle, H, in the mass range of 200 to 1000 GeV, decaying promptly into a pair of long-lived neutral X particles in the mass range of 50 to 350 GeV, each in turn decaying into a quark-antiquark pair. For X with mean proper decay lengths of 0.4 to 200 cm, the upper limits are typically 0.5-200 fb. The results are also interpreted in the context of an R-parity-violating supersymmetric model with long-lived neutralinos decaying into a quark-antiquark pair and a muon. For pair production of squarks that promptly decay to neutralinos with mean proper decay lengths of 2-40 cm, the upper limits on the cross section are typically 0.5-3 fb. The above limits are the most stringent on these channels to date.", journal = "Physical Review D", title = "Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at root s=8 TeV", volume = "91", number = "1", doi = "10.1103/PhysRevD.91.012007" }
Khachatryan, V., Adžić, P., Ekmedžić, M., Milošević, J., Meglić, K., Đorđević, M.,& Milenović, P.. (2015). Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at root s=8 TeV. in Physical Review D, 91(1). https://doi.org/10.1103/PhysRevD.91.012007
Khachatryan V, Adžić P, Ekmedžić M, Milošević J, Meglić K, Đorđević M, Milenović P. Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at root s=8 TeV. in Physical Review D. 2015;91(1). doi:10.1103/PhysRevD.91.012007 .
Khachatryan, V., Adžić, Petar, Ekmedžić, Marko, Milošević, Jovan, Meglić, Katarina, Đorđević, Miloš, Milenović, Predrag, "Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at root s=8 TeV" in Physical Review D, 91, no. 1 (2015), https://doi.org/10.1103/PhysRevD.91.012007 . .