HL/HE BÜYÜK HADRON ÇARPIŞTIRICISIN’DA EVRENSEL ÇOK BOYUTAR VE SÜPERSİMETRİ

Öz

Evrensel Çok Boyutlu (UED) ve Süpersimetrik (SUSY) kuramlar hadron çarpıştırıcılarında benzer sinyaller gösterirler. Parçacık spektrumunun sıkışık olduğu kısmi UED’de (mUED), R-paritesi’nin korunduğu ve sıkışık kütle durumuna spektrumuna sahip SUSY modellerinde olduğu gibi, 1. seviye Kaluza-Klein (KK) gluon ve kuarklar son durumda çoklu jet ve/veya çoklu lepton  kayıp transvers momentum üretirler. Dahası bu benzerlik durumu, fermiyon yığın kütle terimi  ve zara sınırlı kinetik terimleri r ile mUED’nin bir uzantısı olan nmUED modeli vasıtasıyla, sıkışık olmayan kütle spektrumuna da taşınması imkânı olup, bu sayede benzeşme her durumda bütünlük göstermektedir. Bu bağlamda, 1. seviye renkli KK parçacıklarını (kuark ve gulion) ve sparçacıkar (skuark ve gulino) 14 TeV LHC’de üretimini ve bozunumunu çoklu jet  kayıp transvers momentum sinyalini üretmek suretiyle simüle ettik. Daha sonra, her iki modelden de gelen çoklu-jet son durumundan normalize edilmiş m_effdağılımlarını üretip karşılaştırdık. Her iki modelin benzeştiğini ve benzeşmenin, kimi sinyal bölgelerinde düşük istatistikten dolayı dalgalanmalar olmasına rağmen, ayrık kütle spektrumunda dahi gerçekleştiğini bulduk.

Anahtar Kelimeler

• Büyük Hadron Çarpıştırıcısı,Evrensel Çok Boyutlar,Süpersimetri,Fenomenoloji

UNIVERSAL EXTRA DIMENSIONS AND SUPERSYMMETRY AT THE HL/HE-LARGE HADRON COLLIDER

Öz

Universal Extra Dimensional (UED) and Supersymmetric (SUSY) models show very similar signals at hadron colliders. In the minimal UED (mUED) where the mass spectrum is compressed, the production of level-1 KK quarks and/or gluons produce multi-jet and/or multi-lepton + missing transverse momenta final state as in the case of SUSY models with R-parity conservation and compressed mass spectrum. Moreover, this similarity can possibly be carried over to non-degenerate mass spectra in next-to-minimal UED (nmUED) model that is the extension of the mUED model with fermion bulk mass term μ and brane localized kinetic terms r, hence, completing the faking in both models. In this regard, we simulated the production of colored level-1 KK particles and their decays resulting in multi-jet + missing transverse momenta signals in both models at 14 TeV LHC and showed that the similarity of both models is indeed the case even with non-compressed mass spectra

Anahtar Kelimeler

• The Large Hadron Collider,Universal Extra Dimensions,Supersymmetry,Phenomenology

Kaynakça

1. S. P. Martin, “A supersymmetry primer”, https://arxiv.org/abs/hep-ph/9709356.
2. The ATLAS Collaboration 2018. Summary plots from the ATLAS Supersymmetry physics group, https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/combinedSummaryPlots/SUSY/
3. The CMS Collaboration 2018. CMS Supersymmetry Physics Results. https://twiki/cern.ch/twiki/bin/view/CMSPublicResultsSUS
4. The ATLAS Collaboration 2014.” Search for Supersymmetry at the high luminosity LHC with the ATLAS experiment”. https://cds.cern.ch/record/1735031/files/ATL-COM-PHYS-2014-555.pdf
5. The CMS Collaboration 2015. “Supersymmetry discovery potential in future LHC and HL-LHC running with the CMS detector”. https://cds.cern.ch/record/1981344/files/SUS-14-012-pas.pdf
6. Arkani-Hamed N., Dimopoulos S. and Dvali G. R. “The Hierarchy problem and new dimensions at a millimeter”, Physics Letters B, 429, 263-272, 1998.
7. Randall L. and Sundrum R. “A Large mass hierarchy from a small extra dimension”, Physical Review Letters, 83, 3370-3373, 1999.
8. Appelquist T., Cheng H. C. and Dobrescu B. A., “Bounds on universal extra dimensions”, Physical Review D, 64, 035002, 2001.

9. Macesanu C., McMullen C. D. and Nandi S., “Collider implications of universal extra dimensions”, Physical Review D, 66, 015009, 2002.
10. Macesanu C., McMullen C. D. and Nandi S., “New signals for universal extra dimensions”, Physics Letters B, 546, 253, 2002.
11. Macesanu C., McMullen C. D. and Nandi S., “Collider implications of models with extra dimensions”, ICHEP 2002, 2002, 764-766.
12. Cheng H. C., Matchev K. T. and Schmaltz M., “Bosonic supersymmetry? Getting fooled at the LHC”, Physical Review D, 66, 056006, 2002.
13. Cheng H. C., Matchev K. T. and Schmaltz M., “Radiative corrections to Kaluza-Klein masses”, Physical Review D, 66, 036005, 2002.
14. Servant G. and Tait T. M. P., “Is the lightest Kaluza-Klein particle a viable dark matter candidate?”, Nuclear Physics B, 650, 391-419.
15. Cheng H. C., Feng J. L. and Matchev K. T., “Kaluza-Klein dark matter”, Physical Review Letters, 89, 211301, 2002.
16. Kong K. and Matchev K. T., “Precise calculation of the relic density of Kaluza-Klein dark matter in universal extra dimensions”, Journal of High Energy Physics, 0601, 038, 2006.
17. Kong K, Park S. C. and Rizzo T. G., “Collider Phenomenology with Split-UED”, Journal of High Energy Physics, 1004, 081, 2010.
18. Kim D. Oh Y. and Park S. C., “W^' at the LHC with √s=14 TeV: Split universal extra dimension model”, Journal of the Korean Physical Society, 67, 1137-1141, 2015.
19. Flacke T. and Pasold C., “Constraints on split-UED from Electroweak Precision Tests”, Physical Review D, 85, 126007, 2012.
20. Chen C. R., Nojiri M. M., Park S. C., Shu J. and Takeuchi M., “Dark matter and collider phenomenology of split-UED”, Journal of High Energy Physics, 0909, 078, 2009.
21. Kong K., Park S. C. and Rizzo T. G., “A vector-like fourth generation with a discrete symmetry from Split-UED”, Journal of High Energy Physics, 1007, 059, 2010.
22. Huang, G. Y., Kong K. and Park S. C., “Bounds on the Fermion-Bulk Masses in Models with Universal Extra Dimensions”, Journal of High Energy Physics, 1206, 099, 2012.
23. Park S. C. and Shu J, “Split Universal Extra Dimensions and Dark Matter”, Physical Review D, 79, 091702, 2009.
24. Kong K., Park S. C. and Rizzo T. G., “Collider Phenomenology with Split-UED”, Journal of High Energy Physics, 1004, 081, 2010.
25. Dvali G. R., Gabadadze G., Kolanovic M. and Nitti F. “Power of brane-induced gravity”, Physical Review D, 64, 084004, 2001.
26. Carena M., Tait T. M. P. and Wagner C. E. M., “Branes and orbifolds are opaque”, Acta Physica Polonica B, 33, 2355.
27. Aguila del F., Victoria-Perez M. and Santiago J., “Effective description of brane terms in extra dimensions”, Journal of High energy Physics, 0610, 056, 2006.
28. Aguila del F., Victoria-Perez M, and Santiago J., “Bulk fields with general brane kinetic terms”, Journal of High Energy Physics, 0302, 051, 2003.
29. Flacke T., Menon A. and Phalen D. J., “Non-minimal universal extra dimensions”, Physical Review D, 79, 056009, 2009.
30. Flacke T., Kong K. and Park S. C., “Phenomenology of Universal Extra Dimensions with Bulk-Masses and Brane-Localized Terms”, Journal of High Energy Physics, 1305, 111, 2013.
31. The ATLAS Collaboration, “Search for squarks and gluinos in final states with jets and missing transverse momentum using 36 fb^(-1) of√s=13 TeV pp collisions data with the ATLAS detector”, http://cdsweb.cern.ch/record/2258145.
32. The ATLAS Collaboration, “Search for Supersymmetry at the high luminosity LHC with the ATLAS experiment”, https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PUBNOTES/ATL-PHYS-PUB-2014-010/ .
33. Djouadi A. Kneur J. L. and Moultaka G., “SuSpect: A Fortran code for the supersymmetric and Higgs particle spectrum in the MSSM”, Computer Physics Communications, 176, 426, 2007.
34. Sjostrand T., Mrenna S. and Skands P. Z., “PYTHIA 6.4 Physics and Manual”, Journal of High Energy Physics, 0605, 026, 2006.
35. Pukhov A., “CalcHEP 2.3: MSSM, structure functions, event generations, batches, and generation of matrix elements for other packages”, https://arXiv.org/abs/hep-ph/0412191.
36. Datta A., Kong K. and Matchev K. T., “Minimal Universal Extra Dimensions in CalcHEP/CompHEP”, New Journal of Physics, 12, 075017.
37. Alwall J. et al. “A Les Houches Interface for BSM Generators”, https://arXiv.org/abs/0712.3311.
38. Datta A., Kong K. and Matchev K. T., “Discrimination of supersymmetry and universal extra dimensions at hadron colliders”, Physical Review D, 72, 096006, 2005. [Erratum: Phyical Review D, 72, 119901, 2005]
39. Pumplin J., Stump D. R., Huston J., Lai H. L., Nadolsky P. M. and Tung W. K., “New generation of parton distributions with uncertainties from global QCD analysis”, Journal of High Energy Physics, 0207, 012, 2002.
40. Ghosh K., Karabacak D. and Nandi S., “Constraining bosonic supersymmetry from Higgs results and 8 TeV ATLAS multi-jets plus missing energy data”, Journal of High Energy Physics, 09, 076, 2014.