Person: KAYA, MİTHAT
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KAYA
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MİTHAT
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Publication Open Access Measurement of the top quark mass with lepton+jets final states using p p collisions at √s=13TeV(2018-11-01) KAYA, MİTHAT; Sirunyan A., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., Brandstetter J., Brondolin E., Dragicevic M., Erö J., et al.© 2018, CERN for the benefit of the CMS collaboration.The mass of the top quark is measured using a sample of t t ¯ events collected by the CMS detector using proton-proton collisions at s=13TeV at the CERN LHC. Events are selected with one isolated muon or electron and at least four jets from data corresponding to an integrated luminosity of 35.9fb-1. For each event the mass is reconstructed from a kinematic fit of the decay products to a t t ¯ hypothesis. Using the ideogram method, the top quark mass is determined simultaneously with an overall jet energy scale factor (JSF), constrained by the mass of the W boson in q q ¯ ′ decays. The measurement is calibrated on samples simulated at next-to-leading order matched to a leading-order parton shower. The top quark mass is found to be 172.25±0.08(stat+JSF)±0.62(syst)GeV. The dependence of this result on the kinematic properties of the event is studied and compared to predictions of different models of t t ¯ production, and no indications of a bias in the measurements are observed.Publication Open Access MUSiC: a model-unspecific search for new physics in proton–proton collisions at √s=13TeV(2021-07-01) KAYA, MİTHAT; Sirunyan A., Tumasyan A., Adam W., Ambrogi F., Bergauer T., Dragicevic M., Erö J., Del Valle A. E., Frühwirth R., Jeitler M., et al.© 2021, The Author(s).Results of the Model Unspecific Search in CMS (MUSiC), using proton–proton collision data recorded at the LHC at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 35.9fb-1, are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.Publication Metadata only A multi-dimensional search for new heavy resonances decaying to boosted WW , WZ , or ZZ boson pairs in the dijet final state at 13 Te(2020-03-01) KAYA, MİTHAT; Sirunyan A., Tumasyan A., Adam W., Ambrogi F., Bergauer T., Brandstetter J., Dragicevic M., Erö J., Del Valle A. E., Flechl M., et al.© 2020, CERN for the benefit of the CMS collaboration.A search in an all-jet final state for new massive resonances decaying to WW, WZ, or ZZ boson pairs using a novel analysis method is presented. The analysis is performed on data corresponding to an integrated luminosity of 77.3 fb-1 recorded with the CMS experiment at the LHC at a centre-of-mass energy of 13 Te. The search is focussed on potential narrow-width resonances with masses above 1.2 Te, where the decay products of each W or Z boson are expected to be collimated into a single, large-radius jet. The signal is extracted using a three-dimensional maximum likelihood fit of the two jet masses and the dijet invariant mass, yielding an improvement in sensitivity of up to 30% relative to previous search methods. No excess is observed above the estimated standard model background. In a heavy vector triplet model, spin-1 Z ′ and W ′ resonances with masses below 3.5 and 3.8 Te, respectively, are excluded at 95% confidence level. In a bulk graviton model, upper limits on cross sections are set between 27 and 0.2 fb for resonance masses between 1.2 and 5.2 Te, respectively. The limits presented in this paper are the best to date in the dijet final state.Publication Open Access Search for new physics in events with a leptonically decaying Z boson and a large transverse momentum imbalance in proton–proton collisions at √s = 13 TeV(2018-04-01) KAYA, MİTHAT; Sirunyan A., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., Brandstetter J., Brondolin E., Dragicevic M., Erö J., et al.© 2018, CERN for the benefit of the CMS collaboration.A search for new physics in events with a Z boson produced in association with large missing transverse momentum at the LHC is presented. The search is based on the 2016 data sample of proton-proton collisions recorded with the CMS experiment at s=13TeV, corresponding to an integrated luminosity of 35.9fb-1. The results of this search are interpreted in terms of a simplified model of dark matter production via spin-0 or spin-1 mediators, a scenario with a standard-model-like Higgs boson produced in association with the Z boson and decaying invisibly, a model of unparticle production, and a model with large extra spatial dimensions. No significant deviations from the background expectations are found, and limits are set on relevant model parameters, significantly extending the results previously achieved in this channel.Publication Open Access Search for pair production of second-generation leptoquarks at root s=13 TeV(2019-02-01) KAYA, MİTHAT; Sirunyan A. M., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., Brandstetter J., Dragicevic M., Eroe J., Del Valle A. E., et al.A search for pair production of second-generation leptoquarks is performed using proton-proton collision data collected at root s = 13 TeV in 2016 with the CMS detector at the CERN LHC, corresponding to an integrated luminosity of 35.9 fb(-1). Final states with two muons and two jets, or with one muon, two jets, and missing transverse momentum are considered. Second-generation scalar leptoquarks with masses less than 1530(1285) GeVare excluded for ss = 1.0(0.5), where ss is the branching fraction for the decay of a leptoquark to a charged lepton and a quark. The results of the search are also interpreted as limits on the pair production of long-lived top squarks in an R-parity violating supersymmetry model that has a final state with two muons and two jets. These limits represent the most stringent limits to date on these models.Publication Metadata only Combined searches for the production of supersymmetric top quark partners in proton–proton collisions at √s=13Te(2021-11-01) KAYA, MİTHAT; Tumasyan A., Adam W., Andrejkovic J., Bergauer T., Chatterjee S., Dragicevic M., Del Valle A. E., Frühwirth R., Jeitler M., Krammer N., et al.© 2021, The Author(s).A combination of searches for top squark pair production using proton–proton collision data at a center-of-mass energy of 13Te at the CERN LHC, corresponding to an integrated luminosity of 137fb-1 collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on the model, the combined result excludes a top squark mass up to 1325Ge for a massless neutralino, and a neutralino mass up to 700Ge for a top squark mass of 1150Ge. Top squarks with masses from 145 to 295Ge, for neutralino masses from 0 to 100Ge, with a mass difference between the top squark and the neutralino in a window of 30Ge around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420Ge.Publication Metadata only Search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks in proton–proton collisions at √s=13Te(2019-03-01) KAYA, MİTHAT; Sirunyan A., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., Brandstetter J., Dragicevic M., Erö J., Del Valle A. E., et al.© 2019, CERN for the benefit of the CMS collaboration. A search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks is performed in proton–proton collisions at a center-of-mass energy of 13Te collected with the CMS detector at the LHC. The analyzed data sample corresponds to an integrated luminosity of 35.9fb-1. The signal is characterized by a large missing transverse momentum recoiling against a bottom quark–antiquark system that has a large Lorentz boost. The number of events observed in the data is consistent with the standard model background prediction. Results are interpreted in terms of limits both on parameters of the type-2 two-Higgs doublet model extended by an additional light pseudoscalar boson a (2HDM+a) and on parameters of a baryonic Z ′ simplified model. The 2HDM+a model is tested experimentally for the first time. For the baryonic Z ′ model, the presented results constitute the most stringent constraints to date.Publication Open Access Study of excited Lambda(0)(b) states decaying to Lambda(0)(b)pi(+)pi(-) in proton-proton collisions at root s=13TeV(ELSEVIER, 2020-04) KAYA, MİTHAT; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Bergauer, T.; Dragicevic, M.; Eroe, J.; Del Valle, A. Escalante; Flechl, M.; Fruehwirth, R.; Jeitler, M.; Krammer, N.; Kraetschmer, I; Liko, D.; Madlener, T.; Mikulec, I; Rad, N.; Schieck, J.; Schoefbeck, R.; Spanring, M.; Waltenberger, W.; Wulz, C-E; Zarucki, M.; Drugakov, V; Mossolov, V; Gonzalez, J. Suarez; Darwish, M. R.; De Wolf, E. A.; Di Croce, D.; Janssen, X.; Kello, T.; Lelek, A.; Pieters, M.; Sfar, H. Rejeb; Van Haevermaet, H.; Van Mechelen, P.; Van Putte, S.; Van Remortel, N.; Blekman, F.; Bols, E. S.; Chhibra, S. S.; D'Hondt, J.; De Clercq, J.; Lontkovskyi, D.; Lowette, S.; Marchesini, I; Moortgat, S.; Python, Q.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Beghin, D.; Bilin, B.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Dorney, B.; Favart, L.; Grebenyuk, A.; Kalsi, A. K.; Moureaux, L.; Popov, A.; Postiau, N.; Starling, E.; Thomas, L.; Vander Velde, C.; Vanlaer, P.; Vannerom, D.; Cornelis, T.; Dobur, D.; Khvastunov, I; Niedziela, M.; Roskas, C.; Skovpen, K.; Tytgat, M.; Verbeke, W.; Vermassen, B.; Vit, M.; Bruno, G.; Caputo, C.; David, P.; Delaere, C.; Delcourt, M.; Giammanco, A.; Lemaitre, V; Prisciandaro, J.; Saggio, A.; Vischia, P.; Zobec, J.; Alves, G. A.; Correia Silva, G.; Hensel, C.; Moraes, A.; Belchior Batista Das Chagas, E.; Carvalho, W.; Chinellato, J.; Da Coelho, E.; Da Costa, E. M.; Silveira, G. G.; De Jesus Damiao, D.; De Oliveira Martins, C.; Fonseca De Souza, S.; Malbouisson, H.; Martins, J.; Matos Figueiredo, D.; Medina Jaime, M.; Melo De Almeida, M.; Mora Herrera, C.; Mundim, L.; Nogima, H.; Prado Silva, W. L.; Rebello Teles, P.; Rosas, L. J. Sanchez; Santoro, A.; Sznajder, A.; Thiel, M.; Tonelli Manganote, E. J.; Torres Da Silva De Araujo, F.; Vilela Pereira, A.; Bernardes, C. A.; Calligaris, L.; Fernandez Perez Tomei, T. R.; Gregores, E. M.; Lemos, D. S.; Mercadante, P. G.; Novaes, S. F.; Padula, Sandra S.; Aleksandrov, A.; Antchev, G.; Hadjiiska, R.; Iaydjiev, P.; Misheva, M.; Rodozov, M.; Shopova, M.; Sultanov, G.; Bonchev, M.; Dimitrov, A.; Ivanov, T.; Litov, L.; Pavlov, B.; Petkov, P.; Petrov, A.; Fang, W.; Gao, X.; Yuan, L.; Ahmad, M.; Hu, Z.; Wang, Y.; Chen, G. M.; Chen, H. S.; Chen, M.; Jiang, C. H.; Leggat, D.; Liao, H.; Liu, Z.; Spiezia, A.; Tao, J.; Yazgan, E.; Zhang, H.; Zhang, S.; Zhao, J.; Agapitos, A.; Ban, Y.; Chen, G.; Levin, A.; Li, J.; Li, L.; Li, Q.; Mao, Y.; Qian, S. J.; Wang, D.; Wang, Q.; Xiao, M.; Avila, C.; Cabrera, A.; Florez, C.; Gonzalez Hernandez, C. F.; Segura Delgado, M. A.; Mejia Guisao, J.; Ruiz Alvarez, J. D.; Salazar Gonzalez, C. A.; Vanegas Arbelaez, N.; Giljanovic, D.; Godinovic, N.; Lelas, D.; Puljak, I; Sculac, T.; Antunovic, Z.; Kovac, M.; Brigljevic, V; Ferencek, D.; Kadija, K.; Majumder, D.; Mesic, B.; Roguljic, M.; Starodumov, A.; Susa, T.; Ather, M. W.; Attikis, A.; Erodotou, E.; Ioannou, A.; Kolosova, M.; Konstantinou, S.; Mavromanolakis, G.; Mousa, J.; Nicolaou, C.; Ptochos, F.; Razis, P. A.; Rykaczewski, H.; Saka, H.; Tsiakkouri, D.; Finger, M.; Finger, M., Jr.; Kveton, A.; Tomsa, J.; Ayala, E.; Carrera Jarrin, E.; Assran, Y.; Elgammal, S.; Bhowmik, S.; De Oliveira, A. Carvalho Antunes; Dewanjee, R. K.; Ehataht, K.; Kadastik, M.; Raidal, M.; Veelken, C.; Eerola, P.; Forthomme, L.; Kirschenmann, H.; Osterberg, K.; Voutilainen, M.; Brucken, E.; Garcia, F.; Havukainen, J.; Heikkila, J. K.; Karimaki, V; Kim, M. S.; Kinnunen, R.; Lampen, T.; Lassila-Perini, K.; Laurila, S.; Lehti, S.; Linden, T.; Siikonen, H.; Tuominen, E.; Tuominiemi, J.; Luukka, P.; Tuuva, T.; Besancon, M.; Couderc, F.; Dejardin, M.; Denegri, D.; Fabbro, B.; Faure, J. L.; Ferri, F.; Ganjour, S.; Givernaud, A.; Gras, P.; de Monchenault, G. Hamel; Jarry, P.; Leloup, C.; Lenzi, B.; Locci, E.; Malcles, J.; Rander, J.; Rosowsky, A.; Savoy-Navarro, A.; Titov, M.; Yu, G. B.; Ahuja, S.; Amendola, C.; Beaudette, F.; Bonanomi, M.; Busson, P.; Charlot, C.; Diab, B.; Falmagne, G.; de Cassagnac, R. Granier; Kucher, I; Lobanov, A.; Perez, C. Martin; Nguyen, M.; Ochando, C.; Paganini, P.; Rembser, J.; Salerno, R.; Sauvan, J. B.; Sirois, Y.; Zabi, A.; Zghiche, A.; Agram, J-L; Andrea, J.; Bloch, D.; Bourgatte, G.; Brom, J-M; Chabert, E. C.; Collard, C.; Conte, E.; Fontaine, J-C; Gele, D.; Goerlach, U.; Grimault, C.; Le Bihan, A-C; Tonon, N.; Van Hove, P.; Gadrat, S.; Beauceron, S.; Bernet, C.; Boudoul, G.; Camen, C.; Carle, A.; Chanon, N.; Chierici, R.; Contardo, D.; Depasse, P.; El Mamouni, H.; Fay, J.; Gascon, S.; Gouzevitch, M.; Ille, B.; Jain, Sa; Laktineh, I. B.; Lattaud, H.; Lesauvage, A.; Lethuillier, M.; Mirabito, L.; Perries, S.; Sordini, V; Torterotot, L.; Touquet, G.; Vander Donckt, M.; Viret, S.; Toriashvili, T.; Tsamalaidze, Z.; Autermann, C.; Feld, L.; Klein, K.; Lipinski, M.; Meuser, D.; Pauls, A.; Preuten, M.; Rauch, M. P.; Schulz, J.; Teroerde, M.; Erdmann, M.; Fischer, B.; Ghosh, S.; Hebbeker, T.; Hoepfner, K.; Keller, H.; Mastrolorenzo, L.; Merschmeyer, M.; Meyer, A.; Millet, P.; Mocellin, G.; Mondal, S.; Mukherjee, S.; Noll, D.; Novak, A.; Pook, T.; Pozdnyakov, A.; Quast, T.; Radziej, M.; Rath, Y.; Reithler, H.; Roemer, J.; Schmidt, A.; Schuler, S. C.; Sharma, A.; Wiedenbeck, S.; Zaleski, S.; Flgge, G.; Ahmad, W. Haj; Hlushchenko, O.; Kress, T.; Mller, T.; Nowack, A.; Pistone, C.; Pooth, O.; Roy, D.; Sert, H.; Stahl, A.; Martin, M. Aldaya; Asmuss, P.; Babounikau, I; Bakhshiansohi, H.; Beernaert, K.; Behnke, O.; Martinez, A. Bermudez; Bin Anuar, A. A.; Borras, K.; Botta, V; Campbell, A.; Cardini, A.; Connor, P.; Rodriguez, S. Consuegra; Contreras-Campana, C.; Danilov, V; De Wit, A.; Defranchis, M. M.; Pardos, C. Diez; Damiani, D. Dominguez; Eckerlin, G.; Eckstein, D.; Eichhorn, T.; Elwood, A.; Eren, E.; Banos, L. I. Estevez; Gallo, E.; Geiser, A.; Grohsjean, A.; Guthoff, M.; Haranko, M.; Harb, A.; Jafari, A.; Jomhari, N. Z.; Jung, H.; Kasem, A.; Kasemann, M.; Kaveh, H.; Keaveney, J.; Kleinwort, C.; Knolle, J.; Kruecker, D.; Lange, W.; Lenz, T.; Lidrych, J.; Lipka, K.; Lohmann, W.; Mankel, R.; Melzer-Pellmann, I-A; Meyer, A. B.; Meyer, M.; Missiroli, M.; Mnich, J.; Mussgiller, A.; Myronenko, V; Adan, D. Perez; Pflitsch, S. K.; Pitzl, D.; Raspereza, A.; Saibel, A.; Savitskyi, M.; Scheurer, V; Schtze, P.; Schwanenberger, C.; Shevchenko, R.; Singh, A.; Ricardo, R. E. Sosa; Tholen, H.; Turkot, O.; Vagnerini, A.; Van De Klundert, M.; Walsh, R.; Wen, Y.; Wichmann, K.; Wissing, C.; Zenaiev, O.; Zlebcik, R.; Aggleton, R.; Bein, S.; Benato, L.; Benecke, A.; Dreyer, T.; Ebrahimi, A.; Feindt, F.; Froehlich, A.; Garbers, C.; Garutti, E.; Gonzalez, D.; Gunnellini, P.; Haller, J.; Hinzmann, A.; Karavdina, A.; Kasieczka, G.; Klanner, R.; Kogler, R.; Kovalchuk, N.; Kurz, S.; Kutzner, V; Lange, J.; Lange, T.; Malara, A.; Multhaup, J.; Niemeyer, C. E. N.; Reimers, A.; Rieger, O.; Schleper, P.; Schumann, S.; Schwandt, J.; Sonneveld, J.; Stadie, H.; Steinbrck, G.; Vormwald, B.; Zoi, I; Akbiyik, M.; Baselga, M.; Baur, S.; Berger, T.; Butz, E.; Caspart, R.; Chwalek, T.; De Boer, W.; Dierlamm, A.; El Morabit, K.; Faltermann, N.; Giffels, M.; Gottmann, A.; Hartmann, F.; Heidecker, C.; Husemann, U.; Iqbal, M. A.; Kudella, S.; Maier, S.; Mitra, S.; Mozer, M. U.; Mueller, D.; Mueller, Th; Musich, M.; Nuernberg, A.; Quast, G.; Rabbertz, K.; Savoiu, D.; Schaefer, D.; Schnepf, M.; Schroeder, M.; Shvetsov, I; Simonis, H. J.; Ulrich, R.; Wassmer, M.; Weber, M.; Whrmann, C.; Wolf, R.; Wozniewski, S.; Anagnostou, G.; Asenov, P.; Daskalakis, G.; Geralis, T.; Kyriakis, A.; Loukas, D.; Paspalaki, G.; Stakia, A.; Diamantopoulou, M.; Karathanasis, G.; Kontaxakis, P.; Manousakis-katsikakis, A.; Panagiotou, A.; Papavergou, I; Saoulidou, N.; Theofilatos, K.; Vellidis, K.; Vourliotis, E.; Bakas, G.; Kousouris, K.; Papakrivopoulos, I; Tsipolitis, G.; Zacharopoulou, A.; Evangelou, I; Foudas, C.; Gianneios, P.; Katsoulis, P.; Kokkas, P.; Mallios, S.; Manitara, K.; Manthos, N.; Papadopoulos, I; Strologas, J.; Triantis, F. A.; Tsitsonis, D.; M Bartok; Chudasama, R.; Csanad, M.; Major, P.; Mandal, K.; Mehta, A.; Pasztor, G.; Suranyi, O.; Veres, G., I; Bencze, G.; Hajdu, C.; Horvath, D.; Sikler, F.; Veszpremi, V.; Vesztergombi, G.; Beni, N.; Czellar, S.; Karancsi, J.; Molnar, J.; Szillasi, Z.; Raics, P.; Teyssier, D.; Trocsanyi, Z. L.; Zilizi, G.; Csorgo, T.; Lokos, S.; Metzger, W. J.; Nemes, F.; Novak, T.; Choudhury, S.; Komaragiri, J. R.; Panwar, L.; Tiwari, P. C.; Bahinipati, S.; Kar, C.; Kole, G.; Mal, P.; Bindhu, V. K. Muraleedharan Nair; Nayak, A.; Sahoo, D. K.; Swain, S. K.; Bansal, S.; Beri, S. B.; Bhatnagar, V; Chauhan, S.; Dhingra, N.; Gupta, R.; Kaur, A.; Kaur, M.; Kaur, S.; Kumari, P.; Lohan, M.; Meena, M.; Sandeep, K.; Sharma, S.; Singh, J. B.; Virdi, A. K.; Bhardwaj, A.; Choudhary, B. C.; Garg, R. B.; Gola, M.; Keshri, S.; Kumar, A.; Naimuddin, M.; Priyanka, P.; Ranjan, K.; Shah, A.; Sharma, R.; Bhardwaj, R.; Bharti, M.; Bhattacharya, R.; Bhattacharya, S.; Bhawandeep, U.; Bhowmik, D.; Dutta, S.; Gomber, B.; Maity, M.; Mondal, K.; Nandan, S.; Purohit, A.; Rout, P. K.; Saha, G.; Sarkar, S.; Sharan, M.; Singh, B.; Thakur, S.; Behera, P. K.; Behera, S. C.; Kalbhor, P.; Muhammad, A.; Pradhan, R.; Pujahari, P. R.; Sikdar, A. K.; Dutta, D.; Jha, V; Mishra, D. K.; Netrakanti, P. K.; Pant, L. M.; Shukla, P.; Aziz, T.; Bhat, M. A.; Dugad, S.; Verma, R. Kumar; Mohanty, G. B.; Sur, N.; Banerjee, S.; Chatterjee, S.; Guchait, M.; Karmakar, S.; Kumar, S.; Majumder, G.; Mazumdar, K.; Sahoo, N.; Sawant, S.; Dube, S.; Kansal, B.; Kapoor, A.; Kothekar, K.; Pandey, S.; Rane, A.; Rastogi, A.; Chenarani, S.; Etesami, S. M.; Khakzad, M.; Najafabadi, M. Mohammadi; Naseri, M.; Hosseinabadi, F. Rezaei; Felcini, M.; Grunewald, M.; Abbrescia, M.; Aly, R.; Aruta, C.; Calabria, C.; Colaleo, A.; Creanza, D.; Cristella, L.; De Filippis, N.; De Palma, M.; Di Florio, A.; Elmetenawee, W.; Fiore, L.; Gelmi, A.; Iaselli, G.; Ince, M.; Lezki, S.; Maggi, G.; Maggi, M.; Merlin, J. A.; Miniello, G.; My, S.; Nuzzo, S.; Pompili, A.; Pugliese, G.; Radogna, R.; Ranieri, A.; Selvaggi,A study of excited Lambda(0)(b) baryons is reported, based on a data sample collected in 2016-2018 with the CMS detector at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of up to 140fb(-1). The existence of four excited Lambda(0)(b) states: Lambda(0)(b) (5912)(0), Lambda(0)(b) (5920)(0), Lambda(0)(b) (6146)(0), and Lambda(0)(b) (6152)(0) in the Lambda(0)(b)pi(+)pi(-) mass spectrum is confirmed, and their masses are measured. The Lambda(0)(b)pi(+)pi(-) mass distribution exhibits a broad excess of events in the region of 6040-6100 MeV, whose origin cannot be discerned with the present data. (C) 2020 The Author(s). Published by Elsevier B.V.Publication Open Access Recycling of an agricultural bio-waste as a novel cellulose aerogel: a green chemistry study(2020-01-01) KAYA, MİTHAT; KAYA M., Tabak A.Cellulose aerogel (CA) isolated from tea stem wastes (TSW) is a good fire retardant and heat insulator, environmentally friendly, thermally stable and highly porous material with a network structure. These outstanding properties have attracted a huge interest in the materials world. In this study, firstly, following delignification and removing hemicellulose, pure raw cellulose was isolated using TSW, hydrogel form of cellulose was prepared by regeneration of cellulose solution, and then, the final product (CA) was produced via freeze-drying. The data results showed that the aerogel had a three dimensionally network structure. Moreover, it can be deduced that thermal durability of the studied CA could be effective because of its fire retardant and heat insulating property. In addition, the production process of CA is easily available at low cost and sustainable.Publication Open Access Search for physics beyond the standard model in events with jets and two same-sign or at least three charged leptons in proton-proton collisions at √s=13TeV(2020-08-01) KAYA, MİTHAT; Sirunyan A., Tumasyan A., Adam W., Ambrogi F., Bergauer T., Dragicevic M., Erö J., Escalante Del Valle A., Flechl M., Frühwirth R., et al.© 2020, CERN for the benefit of the CMS collaboration.A data sample of events from proton-proton collisions with at least two jets, and two isolated same-sign or three or more charged leptons, is studied in a search for signatures of new physics phenomena. The data correspond to an integrated luminosity of 137fb-1 at a center-of-mass energy of 13TeV, collected in 2016–2018 by the CMS experiment at the LHC. The search is performed using a total of 168 signal regions defined using several kinematic variables. The properties of the events are found to be consistent with the expectations from standard model processes. Exclusion limits at 95% confidence level are set on cross sections for the pair production of gluinos or squarks for various decay scenarios in the context of supersymmetric models conserving or violating R parity. The observed lower mass limits are as large as 2.1TeV for gluinos and 0.9TeV for top and bottom squarks. To facilitate reinterpretations, model-independent limits are provided in a set of simplified signal regions.