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Insertion of STC into TRT at the Department of Physics, Oxford
Credit: CERN

Professor Daniela Bortoletto

Professor and Head of Particle Physics

Research theme

  • Instrumentation
  • Fundamental particles and interactions

Sub department

  • Particle Physics

Research groups

  • AION/Magis
  • ATLAS
  • Future Colliders
  • Mu3e
  • OPMD
daniela.bortoletto@physics.ox.ac.uk
Telephone: 01865 (2)73635
Denys Wilkinson Building, room 608c1
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Search for heavy resonances decaying into a pair of Z bosons in the $$\ell ^+\ell ^-\ell '^+\ell '^-$$ and $$\ell ^+\ell ^-\nu {{\bar{\nu }}}$$ final states using 139 $$\mathrm {fb}^{-1}$$ of proton–proton collisions at $$\sqrt{s} = 13\,$$TeV with the ATLAS detector

The European Physical Journal C SpringerOpen 81:4 (2021) 332

Authors:

G Aad, B Abbott, DC Abbott, A Abed Abud, K Abeling, DK Abhayasinghe, SH Abidi, OS AbouZeid, NL Abraham, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, B Achkar, L Adam, C Adam Bourdarios, L Adamczyk, L Adamek, J Adelman, A Adiguzel, S Adorni, T Adye, AA Affolder, Y Afik, C Agapopoulou

Abstract:

It has been proposed that, beside the known resonance with mass $m_h=$ 125 GeV, the Higgs field might exhibit a second resonance with a larger mass $(M_H)^{\rm Theor} = 690 \pm 10 ~({\rm stat}) \pm 20 ~({\rm sys})$ GeV which, however, would couple to longitudinal W's with the same typical strength as the low-mass state at $125$ GeV and thus represent a relatively narrow resonance. Looking for evidences in the LHC data, from two analyses published in 2021 by ATLAS (searching for heavy resonances decaying into final states with 4 charged leptons or with photon pairs) we have found combined indications for a new resonance of mass $(M_H)^{\rm Exp} \sim $ 680 (15) GeV and total width $(\Gamma_H)^{\rm Exp} \sim$ 45 (15) GeV. More recent results by CMS (searching for heavy resonances decaying into a pair of h(125) Higgs bosons or looking for high-mass photon pairs produced in pp-diffractive scattering) also show definite excesses pointing toward a new resonance of mass $(M_H)^{\rm Exp} \sim$ 660(30) GeV. However, beside the agreement with the predicted mass range, a clean indication derives from the ATLAS 4-lepton data which reproduce to high accuracy the expected correlation between resonating peak cross section $\sigma_R(pp\to H \to 4l)$ and the ratio $\gamma_H=\Gamma_H/M_H$. This correlation is mainly determined by the lower mass $m_h=$ 125 GeV and supports the view that the known $m_h$ and the new heavy resonance are two different excitations of the same Higgs field by effectively eliminating the spin-zero vs. spin-2 ambiguity in the interpretation of the heavy state. The overall statistical evidence might now be above the traditional 5-sigma discovery threshold because, when comparing with a definite theoretical prediction as in our case, local excesses should maintain intact their statistical significance and not be downgraded by the so called "look-elsewhere" effect.Comment: 14 pages, 4 figures, 4 table
More details from the publisher
Details from ORA
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Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in pp collisions at s = 13 TeV with the ATLAS detector

Journal of High Energy Physics Springer Nature 2021:4 (2021) 174

Authors:

G Aad, B Abbott, DC Abbott, A Abed Abud, K Abeling, DK Abhayasinghe, SH Abidi, OS AbouZeid, NL Abraham, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, B Achkar, L Adam, C Adam Bourdarios, L Adamczyk, L Adamek, J Adelman, M Adersberger, A Adiguzel, S Adorni, T Adye, AA Affolder, Y Afik, C Agapopoulou, MN Agaras, A Aggarwal, C Agheorghiesei, JA Aguilar-Saavedra, A Ahmad, F Ahmadov, WS Ahmed, X Ai, G Aielli, S Akatsuka, TPA Åkesson, E Akilli, AV Akimov, K Al Khoury, GL Alberghi, J Albert, MJ Alconada Verzini, S Alderweireldt, M Aleksa, IN Aleksandrov, C Alexa, T Alexopoulos, A Alfonsi, F Alfonsi, M Alhroob, B Ali, S Ali, M Aliev, G Alimonti, C Allaire, BMM Allbrooke, BW Allen, PP Allport, A Aloisio, F Alonso, C Alpigiani, E Alunno Camelia, M Alvarez Estevez, MG Alviggi, Y Amaral Coutinho, A Ambler, L Ambroz, C Amelung, D Amidei, SP Amor Dos Santos, S Amoroso, CS Amrouche, F An, C Anastopoulos, N Andari, T Andeen, JK Anders, SY Andrean, A Andreazza, V Andrei, CR Anelli, S Angelidakis, A Angerami, AV Anisenkov, A Annovi, C Antel, MT Anthony, E Antipov, M Antonelli, DJA Antrim, F Anulli, M Aoki, JA Aparisi Pozo, MA Aparo, L Aperio Bella, N Aranzabal, V Araujo Ferraz, R Araujo Pereira, C Arcangeletti, ATH Arce, FA Arduh, J-F Arguin, S Argyropoulos, J-H Arling, AJ Armbruster, A Armstrong, O Arnaez, H Arnold, ZP Arrubarrena Tame, G Artoni, K Asai, S Asai, T Asawatavonvanich, N Asbah, EM Asimakopoulou, L Asquith, J Assahsah, K Assamagan, R Astalos, RJ Atkin, M Atkinson, NB Atlay, H Atmani, K Augsten, VA Austrup, G Avolio, MK Ayoub, G Azuelos, H Bachacou, K Bachas, M Backes, F Backman, P Bagnaia, M Bahmani, H Bahrasemani, AJ Bailey, VR Bailey, JT Baines, C Bakalis, OK Baker, PJ Bakker, E Bakos, D Bakshi Gupta, S Balaji, EM Baldin, P Balek, F Balli, WK Balunas, J Balz, E Banas, M Bandieramonte, A Bandyopadhyay, Sw Banerjee, L Barak, WM Barbe, EL Barberio, D Barberis, M Barbero, G Barbour, T Barillari, M-S Barisits, J Barkeloo, T Barklow, R Barnea, BM Barnett, RM Barnett, Z Barnovska-Blenessy, A Baroncelli, G Barone, AJ Barr, L Barranco Navarro, F Barreiro, J Barreiro Guimarães da Costa, U Barron, S Barsov, F Bartels, R Bartoldus, G Bartolini, AE Barton, P Bartos, A Basalaev, A Basan, A Bassalat, MJ Basso, RL Bates, S Batlamous, JR Batley, B Batool, M Battaglia, M Bauce, F Bauer, KT Bauer, HS Bawa, JB Beacham, T Beau, PH Beauchemin, F Becherer, P Bechtle, HC Beck, HP Beck, K Becker, C Becot, A Beddall, AJ Beddall, VA Bednyakov, M Bedognetti, CP Bee, TA Beermann, M Begalli, M Begel, A Behera, JK Behr, F Beisiegel, M Belfkir, AS Bell, G Bella, L Bellagamba, A Bellerive, P Bellos, K Beloborodov, K Belotskiy, NL Belyaev, D Benchekroun, N Benekos, Y Benhammou, DP Benjamin, M Benoit, JR Bensinger, S Bentvelsen, L Beresford, M Beretta, D Berge, E Bergeaas Kuutmann, N Berger, B Bergmann, LJ Bergsten, J Beringer, S Berlendis, G Bernardi, C Bernius, FU Bernlochner, T Berry, P Berta, C Bertella, A Berthold, IA Bertram, O Bessidskaia Bylund, N Besson, A Bethani, S Bethke, A Betti, AJ Bevan, J Beyer, DS Bhattacharya, P Bhattarai, VS Bhopatkar, R Bi, RM Bianchi, O Biebel, D Biedermann, R Bielski, K Bierwagen, NV Biesuz, M Biglietti, TRV Billoud, M Bindi, A Bingul, C Bini, S Biondi, CJ Birch-sykes, M Birman, T Bisanz, JP Biswal, D Biswas, A Bitadze, C Bittrich, K Bjørke, T Blazek, I Bloch, C Blocker, A Blue, U Blumenschein, GJ Bobbink, VS Bobrovnikov, SS Bocchetta, D Bogavac, AG Bogdanchikov, C Bohm, V Boisvert, P Bokan, T Bold, AE Bolz, M Bomben, M Bona, JS Bonilla, M Boonekamp, CD Booth, HM Borecka-Bielska, LS Borgna, A Borisov, G Borissov, J Bortfeldt, D Bortoletto, D Boscherini, M Bosman, JD Bossio Sola, K Bouaouda, J Boudreau, EV Bouhova-Thacker, D Boumediene, SK Boutle, A Boveia, J Boyd, D Boye, IR Boyko, AJ Bozson, J Bracinik, N Brahimi, G Brandt, O Brandt, F Braren, B Brau, JE Brau, WD Breaden Madden, K Brendlinger, L Brenner, R Brenner, S Bressler, B Brickwedde, DL Briglin, D Britton, D Britzger, I Brock, R Brock, G Brooijmans, WK Brooks, E Brost, PA Bruckman de Renstrom, B Brüers, D Bruncko, A Bruni, G Bruni, LS Bruni, S Bruno, M Bruschi, N Bruscino, L Bryngemark, T Buanes, Q Buat, P Buchholz, AG Buckley, IA Budagov, MK Bugge, F Bührer, O Bulekov, BA Bullard, TJ Burch, S Burdin, CD Burgard, AM Burger, B Burghgrave, JTP Burr, CD Burton, JC Burzynski, V Büscher, E Buschmann, PJ Bussey, JM Butler, CM Buttar, JM Butterworth, P Butti, W Buttinger, CJ Buxo Vazquez, A Buzatu, AR Buzykaev, G Cabras, S Cabrera Urbán, D Caforio, H Cai, VMM Cairo, O Cakir, N Calace, P Calafiura, G Calderini, P Calfayan, G Callea, LP Caloba, A Caltabiano, S Calvente Lopez, D Calvet, S Calvet, TP Calvet, M Calvetti, R Camacho Toro, S Camarda, D Camarero Munoz, P Camarri, MT Camerlingo, D Cameron, C Camincher, S Campana, M Campanelli, A Camplani, V Canale, A Canesse, M Cano Bret, J Cantero, T Cao, Y Cao, MDM Capeans Garrido, M Capua, R Cardarelli, F Cardillo, G Carducci, I Carli, T Carli, G Carlino, BT Carlson, EM Carlson, L Carminati, RMD Carney, S Caron, E Carquin, S Carrá, G Carratta, JWS Carter, TM Carter, MP Casado, AF Casha, FL Castillo, L Castillo Garcia, V Castillo Gimenez, NF Castro, A Catinaccio, JR Catmore, A Cattai, V Cavaliere, E Cavallaro, V Cavasinni, E Celebi, F Celli, K Cerny, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, A Cervelli, SA Cetin, Z Chadi, D Chakraborty, J Chan, WS Chan, WY Chan, JD Chapman, B Chargeishvili, DG Charlton, TP Charman, CC Chau, S Che, S Chekanov, SV Chekulaev, GA Chelkov, B Chen, C Chen, CH Chen, H Chen, J Chen, J Chen, J Chen, S Chen, SJ Chen, X Chen, Y Chen, Y-H Chen, HC Cheng, HJ Cheng, A Cheplakov, E Cheremushkina, R Cherkaoui El Moursli, E Cheu, K Cheung, TJA Chevalérias, L Chevalier, V Chiarella, G Chiarelli, G Chiodini, AS Chisholm, A Chitan, I Chiu, YH Chiu, MV Chizhov, K Choi, AR Chomont, S Chouridou, YS Chow, LD Christopher, MC Chu, X Chu, J Chudoba, JJ Chwastowski, L Chytka, D Cieri, KM Ciesla, D Cinca, V Cindro, IA Cioară, A Ciocio, F Cirotto, ZH Citron, M Citterio, DA Ciubotaru, BM Ciungu, A Clark, MR Clark, PJ Clark, SE Clawson, C Clement, Y Coadou, M Cobal, A Coccaro, J Cochran, R Coelho Lopes De Sa, H Cohen, AEC Coimbra, B Cole, AP Colijn, J Collot, P Conde Muiño, SH Connell, IA Connelly, S Constantinescu, F Conventi, AM Cooper-Sarkar, F Cormier, KJR Cormier, LD Corpe, M Corradi, EE Corrigan, F Corriveau, MJ Costa, F Costanza, D Costanzo, G Cowan, JW Cowley, J Crane, K Cranmer, RA Creager, S Crépé-Renaudin, F Crescioli, M Cristinziani, V Croft, G Crosetti, A Cueto, T Cuhadar Donszelmann, H Cui, AR Cukierman, WR Cunningham, S Czekierda, P Czodrowski, MM Czurylo, MJ Da Cunha Sargedas De Sousa, JV Da Fonseca Pinto, C Da Via, W Dabrowski, F Dachs, T Dado, S Dahbi, T Dai, C Dallapiccola, M Dam, G D’amen, V D’Amico, J Damp, JR Dandoy, MF Daneri, M Danninger, V Dao, G Darbo, O Dartsi, A Dattagupta, T Daubney, S D’Auria, C David, T Davidek, DR Davis, I Dawson, K De, R De Asmundis, M De Beurs, S De Castro, N De Groot, P de Jong, H De la Torre, A De Maria, D De Pedis, A De Salvo, U De Sanctis, M De Santis, A De Santo, JB De Vivie De Regie, C Debenedetti, DV Dedovich, AM Deiana, J Del Peso, Y Delabat Diaz, D Delgove, F Deliot, CM Delitzsch, M Della Pietra, D Della Volpe, A Dell’Acqua, L Dell’Asta, M Delmastro, C Delporte, PA Delsart, DA DeMarco, S Demers, M Demichev, G Demontigny, SP Denisov, L D’Eramo, D Derendarz, JE Derkaoui, F Derue, P Dervan, K Desch, K Dette, C Deutsch, MR Devesa, PO Deviveiros, FA Di Bello, A Di Ciaccio, L Di Ciaccio, WK Di Clemente, C Di Donato, A Di Girolamo, G Di Gregorio, B Di Micco, R Di Nardo, KF Di Petrillo, R Di Sipio, C Diaconu, FA Dias, T Dias Do Vale, MA Diaz, FG Diaz Capriles, J Dickinson, EB Diehl, J Dietrich, S Díez Cornell, A Dimitrievska, W Ding, J Dingfelder, SJ Dittmeier, F Dittus, F Djama, T Djobava, JI Djuvsland, MAB Do Vale, M Dobre, D Dodsworth, C Doglioni, J Dolejsi, Z Dolezal, M Donadelli, B Dong, J Donini, A D’onofrio, M D’Onofrio, J Dopke, A Doria, MT Dova, AT Doyle, E Drechsler, E Dreyer, T Dreyer, AS Drobac, D Du, TA du Pree, Y Duan, F Dubinin, M Dubovsky, A Dubreuil, E Duchovni, G Duckeck, OA Ducu, D Duda, A Dudarev, AC Dudder, EM Duffield, M D’uffizi, L Duflot, M Dührssen, C Dülsen, M Dumancic, AE Dumitriu, AK Duncan, M Dunford, A Duperrin, H Duran Yildiz, M Düren, A Durglishvili, D Duschinger, B Dutta, D Duvnjak, GI Dyckes, M Dyndal, S Dysch, BS Dziedzic, MG Eggleston, T Eifert, G Eigen, K Einsweiler, T Ekelof, H El Jarrari, V Ellajosyula, M Ellert, F Ellinghaus, AA Elliot, N Ellis, J Elmsheuser, M Elsing, D Emeliyanov, A Emerman, Y Enari, MB Epland, J Erdmann, A Ereditato, PA Erland, M Errenst, M Escalier, C Escobar, O Estrada Pastor, E Etzion, H Evans, MO Evans, A Ezhilov, F Fabbri, L Fabbri, V Fabiani, G Facini, RM Faisca Rodrigues Pereira, RM Fakhrutdinov, S Falciano, PJ Falke, S Falke, J Faltova, Y Fang, Y Fang, G Fanourakis, M Fanti, M Faraj, A Farbin, A Farilla, EM Farina, T Farooque, SM Farrington, P Farthouat, F Fassi, P Fassnacht, D Fassouliotis, M Faucci Giannelli, WJ Fawcett, L Fayard, OL Fedin, W Fedorko, A Fehr, M Feickert, L Feligioni, A Fell, C Feng, M Feng, MJ Fenton, AB Fenyuk, SW Ferguson, J Ferrando, A Ferrante, A Ferrari, P Ferrari, R Ferrari, DE Ferreira de Lima, A Ferrer, D Ferrere, C Ferretti, F Fiedler, A Filipčič, F Filthaut, KD Finelli, MCN Fiolhais, L Fiorini, F Fischer, J Fischer, WC Fisher, T Fitschen, I Fleck, P Fleischmann, T Flick, BM Flierl, L Flores, LR Flores Castillo, FM Follega, N Fomin, JH Foo, GT Forcolin, BC Forland, A Formica, FA Förster, AC Forti, E Fortin, MG Foti, D Fournier, H Fox, P Francavilla, S Francescato, M Franchini, S Franchino, D Francis, L Franco, L Franconi, M Franklin, G Frattari, AN Fray, PM Freeman, B Freund, WS Freund, EM Freundlich, DC Frizzell, D Froidevaux, JA Frost, M Fujimoto, C Fukunaga, E Fullana Torregrosa, T Fusayasu, J Fuster, A Gabrielli, A Gabrielli, S Gadatsch, P Gadow, G Gagliardi, LG Gagnon, GE Gallardo, EJ Gallas, BJ Gallop, G Galster, R Gamboa Goni, KK Gan, S Ganguly, J Gao, Y Gao, YS Gao, FM Garay Walls, C García, JE García Navarro, JA García Pascual, C Garcia-Argos, M Garcia-Sciveres, RW Gardner, N Garelli, S Gargiulo, CA Garner, V Garonne, SJ Gasiorowski, P Gaspar, A Gaudiello, G Gaudio, IL Gavrilenko, A Gavrilyuk, C Gay, G Gaycken, EN Gazis, AA Geanta, CM Gee, CNP Gee, J Geisen, M Geisen, C Gemme, MH Genest, C Geng, S Gentile, S George, T Geralis, LO Gerlach, P Gessinger-Befurt, G Gessner, S Ghasemi, M Ghasemi Bostanabad, M Ghneimat, A Ghosh, A Ghosh, B Giacobbe, S Giagu, N Giangiacomi, P Giannetti, A Giannini, G Giannini, SM Gibson, M Gignac, DT Gil, D Gillberg, G Gilles, DM Gingrich, MP Giordani, PF Giraud, G Giugliarelli, D Giugni, F Giuli, S Gkaitatzis, I Gkialas, EL Gkougkousis, P Gkountoumis, LK Gladilin, C Glasman, J Glatzer, PCF Glaysher, A Glazov, GR Gledhill, I Gnesi, M Goblirsch-Kolb, D Godin, S Goldfarb, T Golling, D Golubkov, A Gomes, R Goncalves Gama, R Gonçalo, G Gonella, L Gonella, A Gongadze, F Gonnella, JL Gonski, S González de la Hoz, S Gonzalez Fernandez, C Gonzalez Renteria, R Gonzalez Suarez, S Gonzalez-Sevilla, GR Gonzalvo Rodriguez, L Goossens, NA Gorasia, PA Gorbounov, HA Gordon, B Gorini, E Gorini, A Gorišek, AT Goshaw, MI Gostkin, CA Gottardo, M Gouighri, AG Goussiou, N Govender, C Goy, I Grabowska-Bold, EC Graham, J Gramling, E Gramstad, S Grancagnolo, M Grandi, V Gratchev, PM Gravila, FG Gravili, C Gray, HM Gray, C Grefe, K Gregersen, IM Gregor, P Grenier, K Grevtsov, C Grieco, NA Grieser, AA Grillo, K Grimm, S Grinstein, J-F Grivaz, S Groh, E Gross, J Grosse-Knetter, ZJ Grout, C Grud, A Grummer, JC Grundy, L Guan, W Guan, C Gubbels, J Guenther, A Guerguichon, JGR Guerrero Rojas, F Guescini, D Guest, R Gugel, T Guillemin, S Guindon, U Gul, J Guo, W Guo, Y Guo, Z Guo, R Gupta, S Gurbuz, G Gustavino, M Guth, P Gutierrez, C Gutschow, C Guyot, C Gwenlan, CB Gwilliam, ES Haaland, A Haas, C Haber, HK Hadavand, A Hadef, M Haleem, J Haley, JJ Hall, G Halladjian, GD Hallewell, K Hamano, H Hamdaoui, M Hamer, GN Hamity, K Han, L Han, S Han, YF Han, K Hanagaki, M Hance, DM Handl, MD Hank, R Hankache, E Hansen, JB Hansen, JD Hansen, MC Hansen, PH Hansen, EC Hanson, K Hara, T Harenberg, S Harkusha, PF Harrison, NM Hartman, NM Hartmann, Y Hasegawa, A Hasib, S Hassani, S Haug, R Hauser, LB Havener, M Havranek, CM Hawkes, RJ Hawkings, S Hayashida, D Hayden, C Hayes, RL Hayes, CP Hays, JM Hays, HS Hayward, SJ Haywood, F He, MP Heath, V Hedberg, S Heer, AL Heggelund, C Heidegger, KK Heidegger, WD Heidorn, J Heilman, S Heim, T Heim, B Heinemann, JG Heinlein, JJ Heinrich, L Heinrich, J Hejbal, L Helary, A Held, S Hellesund, CM Helling, S Hellman, C Helsens, RCW Henderson, Y Heng, L Henkelmann, AM Henriques Correia, H Herde, Y Hernández Jiménez, H Herr, MG Herrmann, T Herrmann, G Herten, R Hertenberger, L Hervas, TC Herwig, GG Hesketh, NP Hessey, H Hibi, A Higashida, S Higashino, E Higón-Rodriguez, K Hildebrand, JC Hill, KK Hill, KH Hiller, SJ Hillier, M Hils, I Hinchliffe, F Hinterkeuser, M Hirose, S Hirose, D Hirschbuehl, B Hiti, O Hladik, DR Hlaluku, J Hobbs, N Hod, MC Hodgkinson, A Hoecker, D Hohn, D Hohov, T Holm, TR Holmes, M Holzbock, LBAH Hommels, TM Hong, JC Honig, A Hönle, BH Hooberman, WH Hopkins, Y Horii, P Horn, LA Horyn, S Hou, A Hoummada, J Howarth, J Hoya, M Hrabovsky, J Hrdinka, J Hrivnac, A Hrynevich, T Hryn’ova, PJ Hsu, S-C Hsu, Q Hu, S Hu, YF Hu, DP Huang, Y Huang, Y Huang, Z Hubacek, F Hubaut, M Huebner, F Huegging, TB Huffman, M Huhtinen, R Hulsken, RFH Hunter, P Huo, N Huseynov, J Huston, J Huth, R Hyneman, S Hyrych, G Iacobucci, G Iakovidis, I Ibragimov, L Iconomidou-Fayard, P Iengo, R Ignazzi, O Igonkina, R Iguchi, T Iizawa, Y Ikegami, M Ikeno, D Iliadis, N Ilic, F Iltzsche, H Imam, G Introzzi, M Iodice, K Iordanidou, V Ippolito, MF Isacson, M Ishino, W Islam, C Issever, S Istin, F Ito, JM Iturbe Ponce, R Iuppa, A Ivina, H Iwasaki, JM Izen, V Izzo, P Jacka, P Jackson, RM Jacobs, BP Jaeger, V Jain, G Jäkel, KB Jakobi, K Jakobs, T Jakoubek, J Jamieson, KW Janas, R Jansky, M Janus, PA Janus, G Jarlskog, AE Jaspan, N Javadov, T Javůrek, M Javurkova, F Jeanneau, L Jeanty, J Jejelava, P Jenni, N Jeong, S Jézéquel, H Ji, J Jia, H Jiang, Y Jiang, Z Jiang, S Jiggins, FA Jimenez Morales, J Jimenez Pena, S Jin, A Jinaru, O Jinnouchi, H Jivan, P Johansson, KA Johns, CA Johnson, RWL Jones, SD Jones, TJ Jones, J Jongmanns, J Jovicevic, X Ju, JJ Junggeburth, A Juste Rozas, A Kaczmarska, M Kado, H Kagan, M Kagan, A Kahn, C Kahra, T Kaji, E Kajomovitz, CW Kalderon, A Kaluza, A Kamenshchikov, M Kaneda, NJ Kang, S Kang, Y Kano, J Kanzaki, LS Kaplan, D Kar, K Karava, MJ Kareem, I Karkanias, SN Karpov, ZM Karpova, V Kartvelishvili, AN Karyukhin, A Kastanas, C Kato, J Katzy, K Kawade, K Kawagoe, T Kawaguchi, T Kawamoto, G Kawamura, EF Kay, S Kazakos, VF Kazanin, R Keeler, R Kehoe, JS Keller, E Kellermann, D Kelsey, JJ Kempster, J Kendrick, KE Kennedy, O Kepka, S Kersten, BP Kerševan, S Ketabchi Haghighat, M Khader, F Khalil-Zada, M Khandoga, A Khanov, AG Kharlamov, T Kharlamova, EE Khoda, A Khodinov, TJ Khoo, G Khoriauli, E Khramov, J Khubua, S Kido, M Kiehn, CR Kilby, E Kim, YK Kim, N Kimura, BT King, A Kirchhoff, D Kirchmeier, J Kirk, AE Kiryunin, T Kishimoto, DP Kisliuk, V Kitali, C Kitsaki, O Kivernyk, T Klapdor-Kleingrothaus, M Klassen, C Klein, MH Klein, M Klein, U Klein, K Kleinknecht, P Klimek, A Klimentov, T Klingl, T Klioutchnikova, FF Klitzner, P Kluit, S Kluth, E Kneringer, EBFG Knoops, A Knue, D Kobayashi, T Kobayashi, M Kobel, M Kocian, T Kodama, P Kodys, DM Koeck, PT Koenig, T Koffas, NM Köhler, M Kolb, I Koletsou, T Komarek, T Kondo, K Köneke, AXY Kong, AC König, T Kono, V Konstantinides, N Konstantinidis, B Konya, R Kopeliansky, S Koperny, K Korcyl, K Kordas, G Koren, A Korn, I Korolkov, EV Korolkova, N Korotkova, O Kortner, S Kortner, VV Kostyukhin, A Kotsokechagia, A Kotwal, A Koulouris, A Kourkoumeli-Charalampidi, C Kourkoumelis, E Kourlitis, V Kouskoura, R Kowalewski, W Kozanecki, AS Kozhin, VA Kramarenko, G Kramberger, D Krasnopevtsev, MW Krasny, A Krasznahorkay, D Krauss, JA Kremer, J Kretzschmar, P Krieger, F Krieter, A Krishnan, K Krizka, K Kroeninger, H Kroha, J Kroll, J Kroll, KS Krowpman, U Kruchonak, H Krüger, N Krumnack, MC Kruse, JA Krzysiak, O Kuchinskaia, S Kuday, D Kuechler, JT Kuechler, S Kuehn, A Kugel, T Kuhl, V Kukhtin, Y Kulchitsky, S Kuleshov, YP Kulinich, M Kuna, T Kunigo, A Kupco, T Kupfer, O Kuprash, H Kurashige, LL Kurchaninov, YA Kurochkin, A Kurova, MG Kurth, ES Kuwertz, M Kuze, AK Kvam, J Kvita, T Kwan, F La Ruffa, C Lacasta, F Lacava, DPJ Lack, H Lacker, D Lacour, E Ladygin, R Lafaye, B Laforge, T Lagouri, S Lai, IK Lakomiec, JE Lambert, S Lammers, W Lampl, C Lampoudis, E Lançon, U Landgraf, MPJ Landon, MC Lanfermann, VS Lang, JC Lange, RJ Langenberg, AJ Lankford, F Lanni, K Lantzsch, A Lanza, A Lapertosa, S Laplace, JF Laporte, T Lari, F Lasagni Manghi, M Lassnig, TS Lau, A Laudrain, A Laurier, M Lavorgna, SD Lawlor, M Lazzaroni, B Le, E Le Guirriec, A Lebedev, 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Search for new phenomena in events with two opposite-charge leptons, jets and missing transverse momentum in pp collisions at $$ \sqrt{\mathrm{s}} $$ = 13 TeV with the ATLAS detector

Journal of High Energy Physics Springer 2021:4 (2021) 165

Authors:

G Aad, B Abbott, DC Abbott, A Abed Abud, K Abeling, DK Abhayasinghe, SH Abidi, OS AbouZeid, NL Abraham, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, B Achkar, L Adam, C Adam Bourdarios, L Adamczyk, L Adamek, J Adelman, A Adiguzel, S Adorni, T Adye, AA Affolder, Y Afik, C Agapopoulou

Abstract:

Neutron stars and quark stars are ideal laboratories to study fundamental physics at supra nuclear densities and strong gravitational fields. Astrophysical observables, however, depend strongly on the star's internal structure, which is currently unknown due to uncertainties in the equation of state. Universal relations, however, exist among certain stellar observables that do not depend sensitively on the star's internal structure. One such set of relations is between the star's moment of inertia ($I$), its tidal Love number (Love) and its quadrupole moment ($Q$), the so-called I-Love-Q relations. Similar relations hold among the star's multipole moments, which resemble the well-known black hole no-hair theorems. Universal relations break degeneracies among astrophysical observables, leading to a variety of applications: (i) X-ray measurements of the nuclear matter equation of state, (ii) gravitational wave measurements of the intrinsic spin of inspiraling compact objects, and (iii) gravitational and astrophysical tests of General Relativity that are independent of the equation of state. We here review how the universal relations come about and all the applications that have been devised to date.Comment: 89 pages, 38 figures; review article submitted to Physics Report
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Search for pair production of scalar leptoquarks decaying into first- or second-generation leptons and top quarks in proton–proton collisions at $$\sqrt{s}$$ = 13 TeV with the ATLAS detector

The European Physical Journal C SpringerOpen 81:4 (2021) 313

Authors:

G Aad, B Abbott, DC Abbott, A Abed Abud, K Abeling, DK Abhayasinghe, SH Abidi, OS AbouZeid, NL Abraham, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, B Achkar, L Adam, C Adam Bourdarios, L Adamczyk, L Adamek, J Adelman, A Adiguzel, S Adorni, T Adye, AA Affolder, Y Afik, C Agapopoulou

Abstract:

A search for pair production of scalar leptoquarks, each decaying into either an electron or a muon and a top quark, is presented. This is the first leptoquark search using ATLAS data to investigate top-philic cross-generational couplings that could provide explanations for recently observed anomalies in B meson decays. This analysis targets high leptoquark masses which cause the decay products of each resultant top quark to be contained within a single high-pT large-radius jet. The full Run 2 dataset is exploited, consisting of 139 fb−1 of data collected from proton–proton collisions at s√=13 TeV from 2015 to 2018 with the ATLAS detector at the CERN Large Hadron Collider. In the absence of any significant deviation from the background expectation, lower limits on the leptoquark masses are set at 1480 GeV and 1470 GeV for the electron and muon channel, respectively.publishedVersio
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A search for the decays of stopped long-lived particles at $\sqrt{s}=13$ TeV with the ATLAS detector

ArXiv 2104.0305 (2021)
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