Leyla AYDIN, Yusuf GÜNAYDIN, Mehmet ŞAHİN

Yüksek Işınlıklı Büyük Hadron Çarpıştırıcısında Uyarılmış Kuarkın Rezonans Üretimi

Bu çalışmada etkileşim Lagranjiyen yöntemi kullanılarak, dejenere durumdaki uyarılmış kuarkların Yüksek Işınlıklı Büyük Hadron Çarpıştırıcısında (YI-BHÇ) rezonans üretimleri incelenmiştir. YI-BHÇ’de rezonans da üretilen uyarılmış kuarkların iki-jet son durumuna sahip olduğu sinyal kanalı için hesaplamalar yapılmıştır. Uyarılmış kuark sinyalini ardalandan ayırt edecek sınırlandırmaları belirlemek için sinyal ardalan analizi yapılmıştır. Bu analiz vasıtasıyla belirlenen sınırlandırmalar kullanılarak YI-BHÇ’de uyarılmış kuarkın kütlesi için keşif, gözlem ve dışarlama limitleri hesaplanmıştır. Ayrıca uyarılmış kuark için kompozitlik ölçeği taraması yapılarak, farklı kütle değerleri için ulaşabileceği en üst kompozitlik ölçeği değerleri hesaplanmıştır. Son olarak 1’den küçük serbest parametre değerlerinde dahi uyarılmış kuarkın YI-BHÇ’de keşif edilebileceği gösterilmiştir. Tüm bu hesaplamaların sonucunda, YI-BHÇ’nin uyarılmış kuarkları araştırmada çok iyi bir potansiyele sahip olacağı ortaya çıkmıştır.

Anahtar Kelimeler:

Uyarılmış Kuark, Kompozit Modeller, Yüksek Işınlıklı Büyük Hadron Çarpıştırcısı, Kompozitlik Ölçeği

Resonance Production of the Excited Quark at High Luminosity Large Hadron Collider

This study investigated the resonance production of excited quarks in the degenerate state using the interaction Lagrangian method. Calculations have been made for the signal channel in which the excited quarks produced in the resonance in High Luminosity Large Hadron Collider (HL-LHC) have dijet final states. Signal background analysis was performed to identify cuts to distinguish the excited quark signal from the background. Using the cuts determined by this analysis, the discovery, observation, and exclusion limits for the mass of the excited quark in the HL-LHC were calculated. In addition, a compositeness scale search was performed for the excited quark, and the highest compositeness scale values that it could reach for different mass values were calculated. Finally, it has been shown that the excited quark can be discovered in HL-LHC even with free parameter values less than 1. As a result of all these calculations, it has been revealed that HL-LHC will have an excellent potential in investigating excited quarks.

Keywords:

Excited quark, Composite Models, High Luminosity Large Hadron Collider, Compositeness Scale,

PDF

___

[1] S. Chatrchyan et al., “Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC,” Phys. Lett. B, 716 (1), 30–61, 2012.
[2] G. Aad et al., “Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC,” Phys. Lett. B, 716 (1):1–29, 2012.
[3] J. C. Pati and A. Salam, “Lepton number as the fourth color,” Phys. Rev. D, 10, 275–289, 1974. [Erratum: Phys. Rev.D11,703 (1975)].
[4] J. C. Pati, A. Salam, and J. A. Strathdee, “Are quarks composite?,” Phys. Lett. B, 59 (3), 265-268, 1975.
[5] F. E. Low, “Heavy electrons and muons,” Phys. Rev. Lett., 14, 238-239, 1965.
[6] O. Cakir ve R. R. Mehdiyev, “Excited quark production at the CERN LHC,” Phys. Rev. D, 60, 034004, 1999.
[7] O. Cakir, C. Leroy, and R. R. Mehdiyev, “Search for excited quarks with the ATLAS experiment at the CERN LHC: Double jets channel,” Phys. Rev. D, 62, 114018, 2000.
[8] O. Cakir, C. Leroy, and R. R. Mehdiyev, “Search for excited quarks with the ATLAS experiment at the CERN LHC:W/Z+jet channel,” Phys. Rev. D, 63, 094014, 2001.
[9] O. J. P. Eboli, S. M. Lietti, ve P. Mathews, “Excited leptons at the CERN large hadron collider,” Phys. Rev. D, 65, 075003, 2002.
[10] O. Cakir, A. Yilmaz, and S. Sultansoy, “Single production of excited electrons at future e- e+, ep and pp colliders,” Phys. Rev. D, 70 (7), 075011, 2004.
[11] O. Çakır and A. Ozansoy, “Search for excited spin-3/2 and spin-1/2 leptons at linear colliders,” Phys. Rev. D, 77, 035002, 2008.
[12] A. Caliskan, S. O. Kara, and A. Ozansoy, “Excited Muon Searches at the FCC-Based Muon-Hadron Colliders,” Adv. High Energy Phys., 2017:1540243, 1-9, 2017.
[13] A. Caliskan, “Excited Neutrino Search Potential of the FCC-Based Electron-Hadron Colliders,” Adv. High Energy Phys., 2017 (4726050), 1-9, 2017.
[14] Y. O. Günaydin, M. Sahin, and S. Sultansoy, “Resonance production of excited u quark at FCC-based γp colliders,” Acta Phys. Pol. B, 49, 1763, 2018.
[15] A. N. Akay, Y. O. Günaydin, M. Sahin, and S. Sultansoy, “Search for Excited u and d Quarks in Dijet Final States at Future pp Colliders,” Adv. High Energy Phys., 2019:9090785, 1-11, 2019.
[16] K. Hagiwara, D. Zeppenfeld, and S. Komamiya, “Excited Lepton Production at LEP and HERA,” Z. Phys. C Part. Fields, 29 (1), 115–122, 1985.
[17] C. Adloff et al., “A Search for excited fermions at HERA,” Eur. Phys. J. C Part. Fields, 17, 567-581, 2000.
[18] S. Chekanov et al., “Searches for excited fermions in ep collisions at HERA,” Phys. Lett. B, 549, 32-47, 2002.
[19] S. Chatrchyan et al., “Search for resonances in the dijet mass spectrum from 7 TeV pp collisions at CMS,” Phys. Lett. B, 704, 123-142, 2011.
[20] G. Aad et al., “Search for new phenomena with photon+jet events in proton-proton collisions at √s = 13 TeV with the ATLAS detector,” J. High. Energy. Phys., 2016:3, 41, 2016.
[21] G. Aad et al., “Search for new phenomena in dijet mass and angular distributions from pp collisions at √s = 13 TeV with the ATLAS detector,” Phys. Lett. B, 754, 302-322, 2016.
[22] CMS Authors, “Search for excited quarks in the photon + jet final state in proton proton collisions at 13 TeV,” CMS-PAS-EXO-16, CERN, Geneva, 015, 2016.
[23] M. Aaboud et al., “Search for new phenomena in dijet events using 37 fb-1 of pp collision data collected at √s=13 TeV with the ATLAS detector,” Phys. Rev. D, 96(5), 052004, 2017.
[24] CMS Authors, “Search for excited states of light and heavy flavor quarks in +jet final state in proton-proton collisions at √s=13 TeV,” CMS-PAS-EXO-17, CERN, Geneva, 002, 2017.
[25] A. M. Sirunyan et al., “Search for massive resonances decaying into WW, WZ, ZZ, qW, and qZ with dijet final states at √s = 13 TeV,” Phys. Rev. D, 97(7), 072006, 2018.
[26] A. M. Sirunyan et al., “Search for excited quarks of light and heavy flavor in +jet final states in proton–proton collisions at √s = 13 TeV,” Phys. Lett. B, 781, 390-411, 2018.
[27] The ATLAS Collaboration, “Search for new resonances in mass distributions of jet pairs using 139 fb−1 of pp collisions at √s = 13 TeV with the ATLAS detector,” J. High. Energy. Phys., 2020 (3), 145, 2020.
[28] Apollinari G., Béjar Alonso I., Brüning O., Fessia P., Lamont M., Rossi L. and Tavian L., High-Luminosity Large Hadron Collider (HL-LHC): Technical Design Report V. 0.1. Geneva: CERN, 2017.
[29] M. Benedikt, D. Schulte, and F. Zimmermann, “Optimizing integrated luminosity of future hadron colliders,” Phys. Rev. Spec. Top-Ac., 18(10), 101002, 2015.
[30] A. Belyaev, N. D. Christensen, and A. Pukhov, “CalcHEP 3.4 for collider physics within and beyond the Standard Model,” Comput. Phys. Commun., 184 (7), 1729-1769, 2013.
[31] A. Semenov, “LanHEP — A package for automatic generation of Feynman rules from the Lagrangian. Version 3.2,” Comput. Phys. Commun., 201, 167-170, 2016.
[32] A. V. Semenov, “LanHEP: A Package for automatic generation of Feynman rules in field theory. Version 2.0,” arXiv:hep-ph/0208011 [hep-ph], 2002.
[33] M. Sahin, G. Aydin, and Y. O. Günaydin, “Excited quarks production at FCC and SppC pp colliders,” Int. J. Mod. Phys. A, 34 (29), 1950169, 2019.
[34] J. Pumplin, D. R. Stump, J. Huston, H.-L. Lai, P. Nadolsky, and W.-K. Tung, “New Generation of Parton Distributions with Uncertainties from Global QCD Analysis,” J. High. Energy. Phys., 2002 (07), 012-012, 2002.
[35] D. Stump et al., “Inclusive jet production, parton distributions, and the search for new physics,” J. High. Energy. Phys., 2003 (10), 046-046, 2003.