%AArun, K.%ABelgacem, Enis%ABenkel, Robert%ABernard, Laura%ABerti, Emanuele%ABertone, Gianfranco%ABesancon, Marc%ABlas, Diego%ABöhmer, Christian%ABrito, Richard%ACalcagni, Gianluca%ACardenas-Avendaño, Alejandro%AClough, Katy%ACrisostomi, Marco%ADe Luca, Valerio%ADoneva, Daniela%AEscoffier, Stephanie%AEzquiaga, José%AFerreira, Pedro%AFleury, Pierre%AFoffa, Stefano%AFranciolini, Gabriele%AFrusciante, Noemi%AGarcía-Bellido, Juan%AHerdeiro, Carlos%AHertog, Thomas%AHinderer, Tanja%AJetzer, Philippe%ALombriser, Lucas%AMaggio, Elisa%AMaggiore, Michele%AMancarella, Michele%AMaselli, Andrea%ANampalliwar, Sourabh%ANichols, David%AOkounkova, Maria%APani, Paolo%APaschalidis, Vasileios%ARaccanelli, Alvise%ARandall, Lisa%ARenaux-Petel, Sébastien%ARiotto, Antonio%ARuiz, Milton%ASaffer, Alexander%ASakellariadou, Mairi%ASaltas, Ippocratis%ASathyaprakash, B.%AShao, Lijing%ASopuerta, Carlos%ASotiriou, Thomas%AStergioulas, Nikolaos%ATamanini, Nicola%AVernizzi, Filippo%AWitek, Helvi%AWu, Kinwah%AYagi, Kent%AYazadjiev, Stoytcho%AYunes, Nicolás%AZilhão, Miguel%AAfshordi, Niayesh%AAngonin, Marie-Christine%ABaibhav, Vishal%ABarausse, Enrico%ABarreiro, Tiago%ABartolo, Nicola%ABellomo, Nicola%ABen-Dayan, Ido%ABergshoeff, Eric%ABernuzzi, Sebastiano%ABertacca, Daniele%ABhagwat, Swetha%ABonga, Béatrice%ABurko, Lior%ACompére, Geoffrey%ACusin, Giulia%Ada Silva, Antonio%ADas, Saurya%Ade Rham, Claudia%ADestounis, Kyriakos%ADimastrogiovanni, Ema%ADuque, Francisco%AEasther, Richard%AFarmer, Hontas%AFasiello, Matteo%AFisenko, Stanislav%AFransen, Kwinten%AFrauendiener, Jörg%AGair, Jonathan%AGergely, László%AGerosa, Davide%AGualtieri, Leonardo%AHan, Wen-Biao%AHees, Aurelien%AHelfer, Thomas%AHennig, Jörg%AJenkins, Alexander%AKajfasz, Eric%AKaloper, Nemanja%AKaras, Vladimír%AKavanagh, Bradley%AKlioner, Sergei%AKoushiappas, Savvas%ALagos, Macarena%APoncin-Lafitte, Christophe%ALobo, Francisco%AMarkakis, Charalampos%AMartín-Moruno, Prado%AMartins, C.%AMatarrese, Sabino%AMayerson, Daniel%AMimoso, José%ANoller, Johannes%ANunes, Nelson%AOliveri, Roberto%AOrlando, Giorgio%APappas, George%APikovski, Igor%APilo, Luigi%APodolský, Jiří%APratten, Geraint%AProkopec, Tomislav%AQi, Hong%ARastgoo, Saeed%ARicciardone, Angelo%ARollo, Rocco%ARubiera-Garcia, Diego%ASergijenko, Olga%AShapiro, Stuart%AShoemaker, Deirdre%ASpallicci, Alessandro%AStashko, Oleksandr%AStein, Leo%ATasinato, Gianmassimo%ATolley, Andrew%AVagenas, Elias%AVandoren, Stefan%AVernieri, Daniele%AVicente, Rodrigo%AWiseman, Toby%AZhdanov, Valery%AZumalacárregui, Miguel%BJournal Name: Living Reviews in Relativity; Journal Volume: 25; Journal Issue: 1 %D2022%I %JJournal Name: Living Reviews in Relativity; Journal Volume: 25; Journal Issue: 1 %K %MOSTI ID: 10337402 %PMedium: X %TNew horizons for fundamental physics with LISA %XAbstract The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitational interaction is both strong and dynamical. In this white paper, the Fundamental Physics Working Group of the LISA Consortium summarizes the current topics in fundamental physics where LISA observations of gravitational waves can be expected to provide key input. We provide the briefest of reviews to then delineate avenues for future research directions and to discuss connections between this working group, other working groups and the consortium work package teams. These connections must be developed for LISA to live up to its science potential in these areas. %0Journal Article