Hydrodynamics with multiple charges and holography

Journal of High Energy Physics Springer 2025:12 (2025) 173

Authors:

Liam Gladden, Victor Ivo, Pavel K Kovtun, Andrei O Starinets

Abstract:

We establish the connection between thermodynamic and dynamical instabilities in relativistic hydrodynamics with multiple flavours of conserved U(1) charges. In theories with positive hydrodynamic entropy production, where the underlying perfect fluid has a positive speed of sound squared and satisfies the null energy condition, we show that hydrodynamic instabilities can arise only through negative diffusion coefficients associated with the U(1) charges. The onset of such instabilities is governed by the eigenvalues of the thermodynamic Hessian matrix, while the flavour-space polarisations of the unstable diffusion modes are determined by the corresponding eigenvectors. We illustrate this connection using strongly coupled 𝒩 = 4 supersymmetric Yang-Mills theory at finite densities of the three U(1) R-charges. In the dual holographic description, the five-dimensional STU black brane exhibits unstable quasinormal modes precisely at the onset of thermodynamic instability. We derive analytic expressions for the R-charge diffusion coefficients in several representative cases, including the configuration with three equal chemical potentials.

Constraining the Prompt Atmospheric Neutrino Flux Combining IceCube's Cascade and Track Samples

ArXiv 2512.1776 (2025)

Authors:

R Abbasi, M Ackermann, J Adams, SK Agarwalla, JA Aguilar, M Ahlers, JM Alameddine, S Ali, NM Amin, K Andeen, C Argüelles, Y Ashida, S Athanasiadou, SN Axani, R Babu, X Bai, J Baines-Holmes, A Balagopal V, SW Barwick, S Bash, V Basu, R Bay, JJ Beatty, J Becker Tjus, P Behrens, J Beise, C Bellenghi, S Benkel, S BenZvi, D Berley, E Bernardini, DZ Besson, E Blaufuss, L Bloom, S Blot, I Bodo, F Bontempo, JY Book Motzkin, C Boscolo Meneguolo, S Böser, O Botner, J Böttcher, J Braun, B Brinson, Z Brisson-Tsavoussis, RT Burley, D Butterfield, MA Campana, K Carloni, J Carpio, S Chattopadhyay, N Chau, Z Chen, D Chirkin, S Choi, BA Clark, P Coleman, GH Collin, DA Coloma Borja, A Connolly, JM Conrad, DF Cowen, C De Clercq, JJ DeLaunay, D Delgado, T Delmeulle, S Deng, P Desiati, KD de Vries, G de Wasseige, T DeYoung, JC Díaz-Vélez, S DiKerby, T Ding, M Dittmer, A Domi, L Draper, L Dueser, D Durnford, K Dutta, MA DuVernois, T Ehrhardt, L Eidenschink, A Eimer, C Eldridge, P Eller, E Ellinger, D Elsässer, R Engel, H Erpenbeck, W Esmail, S Eulig, J Evans, PA Evenson, KL Fan, K Fang, K Farrag, AR Fazely, A Fedynitch, N Feigl, C Finley, L Fischer, D Fox, A Franckowiak, S Fukami, P Fürst, J Gallagher, E Ganster, A Garcia, M Garcia, G Garg, E Genton, L Gerhardt, A Ghadimi, C Glaser, T Glüsenkamp, JG Gonzalez, S Goswami, A Granados, D Grant, SJ Gray, S Griffin, S Griswold, KM Groth, D Guevel, C Günther, P Gutjahr, C Ha, C Haack, A Hallgren, L Halve, F Halzen, L Hamacher, M Ha Minh, M Handt, K Hanson, J Hardin, AA Harnisch, P Hatch, A Haungs, J Häußler, K Helbing, J Hellrung, B Henke, L Hennig, F Henningsen, L Heuermann, R Hewett, N Heyer, S Hickford, A Hidvegi, C Hill, GC Hill, R Hmaid, KD Hoffman, D Hooper, S Hori, K Hoshina, M Hostert, W Hou, M Hrywniak, T Huber, K Hultqvist, K Hymon, A Ishihara, W Iwakiri, M Jacquart, S Jain, O Janik, M Jansson, M Jeong, M Jin, N Kamp, D Kang, W Kang, A Kappes, L Kardum, T Karg, M Karl, A Karle, A Katil, M Kauer, JL Kelley, M Khanal, A Khatee Zathul, A Kheirandish, H Kimku, J Kiryluk, C Klein, SR Klein, Y Kobayashi, A Kochocki, R Koirala, H Kolanoski, T Kontrimas, L Köpke, C Kopper, DJ Koskinen, P Koundal, M Kowalski, T Kozynets, A Kravka, N Krieger, J Krishnamoorthi, T Krishnan, K Kruiswijk, E Krupczak, A Kumar, E Kun, N Kurahashi, N Lad, C Lagunas Gualda, L Lallement Arnaud, MJ Larson, F Lauber, JP Lazar, K Leonard DeHolton, A Leszczyńska, C Li, J Liao, C Lin, QR Liu, YT Liu, M Liubarska, C Love, L Lu, F Lucarelli, W Luszczak, Y Lyu, M Macdonald, J Madsen, E Magnus, Y Makino, E Manao, S Mancina, A Mand, IC Mari ş, S Marka, Z Marka, L Marten, I Martinez-Soler, R Maruyama, J Mauro, F Mayhew, F McNally, K Meagher, S Mechbal, A Medina, M Meier, Y Merckx, L Merten, J Mitchell, L Molchany, S Mondal, T Montaruli, RW Moore, Y Morii, A Mosbrugger, M Moulai, D Mousadi, E Moyaux, T Mukherjee, R Naab, M Nakos, U Naumann, J Necker, L Neste, M Neumann, H Niederhausen, MU Nisa, K Noda, A Noell, A Novikov, A Obertacke, V O'Dell, A Olivas, R Orsoe, J Osborn, E O'Sullivan, V Palusova, H Pandya, A Parenti, N Park, V Parrish, EN Paudel, L Paul, C Pérez de los Heros, T Pernice, TC Petersen, J Peterson, M Plum, A Pontén, V Poojyam, Y Popovych, M Prado Rodriguez, B Pries, R Procter-Murphy, GT Przybylski, L Pyras, C Raab, J Rack-Helleis, N Rad, M Ravn, K Rawlins, Z Rechav, A Rehman, I Reistroffer, E Resconi, S Reusch, CD Rho, W Rhode, L Ricca, B Riedel, A Rifaie, EJ Roberts, M Rongen, A Rosted, C Rott, T Ruhe, L Ruohan, D Ryckbosch, J Saffer, D Salazar-Gallegos, P Sampathkumar, A Sandrock, G Sanger-Johnson, M Santander, S Sarkar, M Scarnera, P Schaile, M Schaufel, H Schieler, S Schindler, L Schlickmann, B Schlüter, F Schlüter, N Schmeisser, T Schmidt, FG Schröder, L Schumacher, S Schwirn, S Sclafani, D Seckel, L Seen, M Seikh, S Seunarine, PA Sevle Myhr, R Shah, S Shah, S Shefali, N Shimizu, B Skrzypek, R Snihur, J Soedingrekso, D Soldin, P Soldin, G Sommani, C Spannfellner, GM Spiczak, C Spiering, J Stachurska, M Stamatikos, T Stanev, T Stezelberger, T Stürwald, T Stuttard, GW Sullivan, I Taboada, S Ter-Antonyan, A Terliuk, A Thakuri, M Thiesmeyer, WG Thompson, J Thwaites, S Tilav, K Tollefson, S Toscano, D Tosi, A Trettin, AK Upadhyay, K Upshaw, A Vaidyanathan, N Valtonen-Mattila, J Valverde, J Vandenbroucke, T Van Eeden, N van Eijndhoven, L Van Rootselaar, J van Santen, J Vara, F Varsi, M Venugopal, M Vereecken, S Vergara Carrasco, S Verpoest, D Veske, A Vijai, J Villarreal, C Walck, A Wang, EHS Warrick, C Weaver, P Weigel, A Weindl, J Weldert, AY Wen, C Wendt, J Werthebach, M Weyrauch, N Whitehorn, CH Wiebusch, DR Williams, L Witthaus, M Wolf, G Wrede, XW Xu, JP Yanez, Y Yao, E Yildizci, S Yoshida, R Young, F Yu, S Yu, T Yuan, S Yun-Cárcamo, A Zander Jurowitzki, A Zegarelli, S Zhang, Z Zhang, P Zhelnin, P Zilberman

Operation of silicon photomultipliers in a dilution refrigerator down to 9.4 mK towards a cryogenic cosmic ray muon veto system

(2025)

Authors:

DMC Collaboration, A Kemp, S Autti, E Bloomfield, A Casey, N Darvishi, N Eng, P Franchini, RP Haley, PJ Heikkinen, A Jennings, S Koulosousas, E Leason, LV Levitin, J March-Russell, A Mayer, J Monroe, D Münstermann, MT Noble, JR Prance, X Rojas, T Salmon, J Saunders, J Smirnov, R Smith, MD Thompson, A Thomson, A Ting, V Tsepelin, SM West, L Whitehead, DE Zmeev

Prompt Searches for Very-High-Energy γ-Ray Counterparts to IceCube Astrophysical Neutrino Alerts

(2025)

Authors:

J Abhir, A Biland, K Brand, T Bretz, D Dorner, L Eisenberger, D Elsaesser, P Günther, S Hasan, D Hildebrand, K Mannheim, M Linhoff, F Pfeifle, W Rhode, B Schleicher, V Sliusar, M Vorbrugg, R Walter, F Aharonian, F Ait Benkhali, J Aschersleben, H Ashkar, M Backes, V Barbosa Martins, R Batzofin, Y Becherini, D Berge, M Böttcher, C Boisson, J Bolmont, J Borowska, R Brose, A Brown, F Brun, B Bruno, S Casanova, J Celic, M Cerruti, A Chen, M Chernyakova, J Chibueze, O Chibueze, B Cornejo, G Cotter, G Cozzolongo, J Damascene Mbarubucyeye, J de Assis Scarpin, A Delgado Giles, A Djannati-Ataï, J Djuvsland, A Dmytriiev, K Egberts, K Egg, S Einecke, J-P Ernenwein, C Escañ, K Feijen, M Filipovic, G Fontaine, S Funk, S Gabici, JF Glicenstein, P Goswami, G Grolleron, B Heß, JA Hinton, M Holler, M Jamrozy, F Jankowsky, I Jung-Richardt, E Kasai, K Katarzyń, H Katjaita, D Kerszberg, R Khatoon, B Khélifi, W Kluź, Nu Komin, R Konno, K Kosack, D Kostunin, G Kukec Mezek, RG Lang, A Lemière, M Lemoine-Goumard, J-P Lenain, A Luashvili, J Mackey, V Marandon, G Martí-Devesa, R Marx, M Mayer, A Mehta, A Mitchell, R Moderski, MO Moghadam, L Mohrmann, E Moulin, M de Naurois, J Niemiec, E de Ona Wilhelmi, S Panny, M Panter, RD Parsons, U Pensec, P Pichard, G Pühlhofer, M Punch, A Quirrenbach, M Regeard, O Reimer, H Ren, F Rieger, G Rowell, B Rudak, K Sabri, V Sahakian, H Salzmann, M Sasaki, J Schäfer, F Schüssler, HM Schutte, M Senniappan, JNS Shapopi, A Sharma, H Sol, S Spencer, Ł., R Steenkamp, S Steinmassl, C Steppa, T Takahashi, T Tanaka, AM Taylor, M Tsirou, C van Eldik, M Vecchi, C Venter, J Vink, T Wach, SJ Wagner, A Wierzcholska, M Zacharias, AA Zdziarski, A Zech, N Żywucka, S Abe, J Abhir, A Abhishek, A Aguasca-Cabot, I Agudo, T Aniello, S Ansoldi, LA Antonelli, A Arbet Engels, C Arcaro, M Artero, K Asano, A Babić, C Bakshi, U Barres de Almeida, JA Barrio, L Barrios-Jiménez, I Batković, J Baxter, J Becerra González, W Bednarek, E Bernardini, J Bernete, A Berti, J Besenrieder, C Bigongiari, A Biland, O Blanch, H Bökenkamp, G Bonnoli, Ž, E Bronzini, I Burelli, A Campoy-Ordaz, A Carosi, R Carosi, M Carretero-Castrillo, AJ Castro-Tirado, D Cerasole, G Ceribella, Y Chai, A Chilingarian, A Cifuentes, JL Contreras, J Cortina, S Covino, G D'Amico, P Da Vela, F Dazzi, A De Angelis, B De Lotto, M Delfino, C Delgado Mendez, F Di Pierro, R Di Tria, L Di Venere, A Dinesh, D Dominis Prester, A Donini, D Dorner, M Doro, L Eisenberger, D Elsaesser, J Escudero, L Fariña, A Fattorini, L Foffano, L Font, S Fröse, Y Fukazawa, S Gasparyan, M Gaug, JG Giesbrecht Paiva, N Giglietto, F Giordano, P Gliwny, N Godinović, T Gradetzke, R Grau, D Green, JG Green, P Günther, D Hadasch, A Hahn, T Hassan, L Heckmann, D Hrupec, R Imazawa, D Israyelyan, I Jiménez Martínez, J Jiménez Quiles, J Jormanainen, S Kankkunen, T Kayanoki, D Kerszberg, J Konrad, PM Kouch, H Kubo, J Kushida, M Láinez, A Lamastra, E Lindfors, S Lombardi, F Longo, R López-Coto, M López-Moya, A López-Oramas, S Loporchio, L Lulić, E Lyard, P Majumdar, M Makariev, M Mallamaci, G Maneva, M Manganaro, S Mangano, S Marchesi, M Mariotti, M Martínez, P Maruš, A Mas-Aguilar, D Mazin, S Menchiari, J Méndez Gallego, D Miceli, JM Miranda, R Mirzoyan, M Molero González, E Molina, HA Mondal, A Moralejo, T Nakamori, C Nanci, V Neustroev, M Nievas Rosillo, C Nigro, L Nikolić, K Nilsson, K Nishijima, K Noda, S Nozaki, A Okumura, J Otero-Santos, S Paiano, D Paneque, JM Paredes, M Peresano, M Persic, M Pihet, F Podobnik, PG Prada Moroni, E Prandini, M Ribó, J Rico, T Saito, S Sakurai, K Satalecka, FG Saturni, K Schmitz, F Schmuckermaier, JL Schubert, A Sciaccaluga, G Silvestri, J Sitarek, V Sliusar, D Sobczynska, A Stamerra, J Striš, D Strom, M Strzys, Y Suda, H Tajima, M Takahashi, R Takeishi, P Temnikov, K Terauchi, T Terzić, A Tutone, S Ubach, J van Scherpenberg, M Vazquez Acosta, S Ventura, G Verna, I Viale, A Vigliano, CF Vigorito, E Visentin, V Vitale, I Vovk, R Walter, F Wersig, M Will, T Yamamoto, PKH Yeung, S Yoo, A Acharyya, A Archer, P Bangale, JT Bartkoske, W Benbow, JH Buckley, Y Chen, JL Christiansen, AJ Chromey, M Errando, S Feldman, Q Feng, S Filbert, L Fortson, A Furniss, W Hanlon, O Hervet, CE Hinrichs, J Holder, Z Hughes, TB Humensky, W Jin, MN Johnson, P Kaaret, M Kertzman, M Kherlakian, D Kieda, TK Kleiner, N Korzoun, MJ Lang, M Lundy, G Maier, MJ Millard, J Millis, P Moriarty, R Mukherjee, W Ning, RA Ong, A Pandey, M Pohl, J Quinn, PL Rabinowitz, K Ragan, PT Reynolds, D Ribeiro, E Roache, I Sadeh, AC Sadun, L Saha, M Santander, GH Sembroski, R Shang, D Tak, AK Talluri, JV Tucci, J Valverde, VV Vassiliev, DA Williams, SL Wong, S Buson, R Abbasi, M Ackermann, J Adams, SK Agarwalla, JA Aguilar, M Ahlers, JM Alameddine, S Ali, NM Amin, K Andeen, C Argü, Y Ashida, S Athanasiadou, SN Axani, R Babu, X Bai, J Baines-Holmes, A Balagopal V., SW Barwick, S Bash, V Basu, R Bay, JJ Beatty, J Becker Tjus, P Behrens, J Beise, C Bellenghi, B Benkel, S BenZvi, D Berley, E Bernardini, DZ Besson, E Blaufuss, L Bloom, S Blot, I Bodo, F Bontempo, JY Book Motzkin, C Boscolo Meneguolo, S Bö, O Botner, J Bö, J Braun, B Brinson, Z Brisson-Tsavoussis, RT Burley, D Butterfield, MA Campana, K Carloni, J Carpio, S Chattopadhyay, N Chau, Z Chen, D Chirkin, S Choi, BA Clark, A Coleman, P Coleman, GH Collin, DA Coloma Borja, A Connolly, JM Conrad, DF Cowen, C De Clercq, JJ DeLaunay, D Delgado, T Delmeulle, S Deng, P Desiati, KD de Vries, G de Wasseige, T DeYoung, JC Dí, S DiKerby, T Ding, M Dittmer, A Domi, L Draper, L Dueser, D Durnford, K Dutta, MA DuVernois, T Ehrhardt, L Eidenschink, A Eimer, P Eller, E Ellinger, D Elsä, R Engel, H Erpenbeck, W Esmail, S Eulig, J Evans, PA Evenson, KL Fan, K Fang, K Farrag, AR Fazely, A Fedynitch, N Feigl, C Finley, L Fischer, D Fox, A Franckowiak, S Fukami, P Fü, J Gallagher, E Ganster, A Garcia, M Garcia, G Garg, E Genton, L Gerhardt, A Ghadimi, C Glaser, T Glü, JG Gonzalez, S Goswami, A Granados, D Grant, SJ Gray, S Griffin, S Griswold, KM Groth, D Guevel, C Gü, P Gutjahr, C Ha, C Haack, A Hallgren, L Halve, F Halzen, L Hamacher, M Ha Minh, M Handt, K Hanson, J Hardin, AA Harnisch, P Hatch, A Haungs, J Hä, K Helbing, J Hellrung, B Henke, L Hennig, F Henningsen, L Heuermann, R Hewett, N Heyer, S Hickford, A Hidvegi, C Hill, GC Hill, R Hmaid, KD Hoffman, D Hooper, S Hori, K Hoshina, M Hostert, W Hou, M Hrywniak, T Huber, K Hultqvist, K Hymon, A Ishihara, W Iwakiri, M Jacquart, S Jain, O Janik, M Jansson, M Jeong, M Jin, N Kamp, D Kang, W Kang, X Kang, A Kappes, L Kardum, T Karg, M Karl, A Karle, A Katil, M Kauer, JL Kelley, M Khanal, A Khatee Zathul, A Kheirandish, H Kimku, J Kiryluk, C Klein, SR Klein, Y Kobayashi, A Kochocki, R Koirala, H Kolanoski, T Kontrimas, L Kö, C Kopper, DJ Koskinen, P Koundal, M Kowalski, T Kozynets, A Kravka, N Krieger, J Krishnamoorthi, T Krishnan, K Kruiswijk, E Krupczak, A Kumar, E Kun, N Kurahashi, N Lad, C Lagunas Gualda, L Lallement Arnaud, M Lamoureux, MJ Larson, F Lauber, JP Lazar, K Leonard DeHolton, A Leszczyń, J Liao, C Lin, YT Liu, M Liubarska, C Love, L Lu, F Lucarelli, W Luszczak, Y Lyu, M Macdonald, J Madsen, E Magnus, Y Makino, E Manao, S Mancina, A Mand, IC Mariş, S Marka, Z Marka, L Marten, I Martinez-Soler, R Maruyama, J Mauro, F Mayhew, F McNally, JV Mead, K Meagher, S Mechbal, A Medina, M Meier, Y Merckx, L Merten, J Mitchell, L Molchany, S Mondal, T Montaruli, RW Moore, Y Morii, A Mosbrugger, M Moulai, D Mousadi, E Moyaux, T Mukherjee, R Naab, M Nakos, U Naumann, J Necker, L Neste, M Neumann, H Niederhausen, MU Nisa, K Noda, A Noell, A Novikov, A Obertacke, V O'Dell, A Olivas, R Orsoe, J Osborn, E O'Sullivan, V Palusova, H Pandya, A Parenti, N Park, V Parrish, EN Paudel, L Paul, C Pé, T Pernice, TC Petersen, J Peterson, M Plum, A Ponté, V Poojyam, Y Popovych, M Prado Rodriguez, B Pries, R Procter-Murphy, GT Przybylski, L Pyras, C Raab, J Rack-Helleis, N Rad, M Ravn, K Rawlins, Z Rechav, A Rehman, I Reistroffer, E Resconi, S Reusch, CD Rho, W Rhode, L Ricca, B Riedel, A Rifaie, EJ Roberts, M Rongen, A Rosted, C Rott, T Ruhe, L Ruohan, D Ryckbosch, J Saffer, D Salazar-Gallegos, P Sampathkumar, A Sandrock, G Sanger-Johnson, M Santander, S Sarkar, J Savelberg, M Scarnera, P Schaile, M Schaufel, H Schieler, S Schindler, L Schlickmann, B Schlü, F Schlü, N Schmeisser, T Schmidt, FG Schrö, L Schumacher, S Schwirn, S Sclafani, D Seckel, L Seen, M Seikh, S Seunarine, PA Sevle Myhr, R Shah, S Shefali, N Shimizu, B Skrzypek, R Snihur, J Soedingrekso, A Sø, D Soldin, P Soldin, G Sommani, C Spannfellner, GM Spiczak, C Spiering, J Stachurska, M Stamatikos, T Stanev, T Stezelberger, T Stü, T Stuttard, GW Sullivan, I Taboada, S Ter-Antonyan, A Terliuk, A Thakuri, M Thiesmeyer, WG Thompson, J Thwaites, S Tilav, K Tollefson, S Toscano, D Tosi, A Trettin, AK Upadhyay, K Upshaw, A Vaidyanathan, N Valtonen-Mattila, J Valverde, J Vandenbroucke, T Van Eeden, N van Eijndhoven, L Van Rootselaar, J van Santen, J Vara, F Varsi, M Venugopal, M Vereecken, S Vergara Carrasco, S Verpoest, D Veske, A Vijai, J Villarreal, C Walck, A Wang, EHS Warrick, C Weaver, P Weigel, A Weindl, J Weldert, AY Wen, C Wendt, J Werthebach, M Weyrauch, N Whitehorn, CH Wiebusch, DR Williams, L Witthaus, M Wolf, G Wrede, XW Xu, JP Yanez, Y Yao, E Yildizci, S Yoshida, R Young, F Yu, S Yu, T Yuan, A Zander Jurowitzki, A Zegarelli, S Zhang, Z Zhang, P Zhelnin, P Zilberman, F D'Ammando

Self-tracking solutions for asymptotic scalar fields

Journal of High Energy Physics Springer 2025:12 (2025) 135

Authors:

Martin Mosny, Joseph P Conlon, Edmund J Copeland

Abstract:

We explore the dynamics of pure scalar fields rolling on an exponential potential in the absence of any additional background fluid and demonstrate the existence of self-tracking solutions in which the self-perturbations of the scalar field act as an effective radiation background. The validity of these solutions is demonstrated through both analytic techniques and numerical simulations using CosmoLattice. We discuss applications to string cosmologies with significant trans-Planckian field excursions between inflation and BBN, including the required initial level of scalar perturbations to avoid overshoot.