{"id":10064,"global_id":"www.lapth.cnrs.fr\/en\/?id=10064","global_id_lineage":["www.lapth.cnrs.fr\/en\/?id=10064"],"author":"8","status":"publish","date":"2025-03-29 13:21:44","date_utc":"2025-03-29 12:21:44","modified":"2025-04-01 10:52:09","modified_utc":"2025-04-01 08:52:09","url":"https:\/\/www.lapth.cnrs.fr\/en\/event\/implications-of-b-to-k-ubar-u-under-rank-one-flavour-violation-hypothesis\/","rest_url":"https:\/\/www.lapth.cnrs.fr\/en\/wp-json\/tribe\/events\/v1\/events\/10064","title":"Implications of $B^+ to K^+  ubar u$ under rank-one flavour violation hypothesis","description":"<p>Speakers: Claudio Toni<br \/>\nWe study the implications of the observed excess at Belle-II under the assumption of Rank-One Flavour Violation, i.e. that New Physics couples to a single specific direction in flavour space. By varying this direction we perform analyses at the level of the low-energy EFT, the SMEFT, and with explicit mediators such as leptoquarks and colorless vectors. Among the various mediators, the scalar leptoquarks $tilde{R}_2$ and $S_1$ offer the best fits of the Belle-II excess, while being consistent with the other bounds. On the other hand, colorless vectors are strongly constrained by meson mixing and resonance searches. In all cases we find that a flavour alignment close to the third generation is generically preferred.<br \/>\nhttps:\/\/indico.in2p3.fr\/event\/36029\/<\/p>","excerpt":"","slug":"implications-of-b-to-k-ubar-u-under-rank-one-flavour-violation-hypothesis","image":false,"all_day":false,"start_date":"2025-04-01 09:00:00","start_date_details":{"year":"2025","month":"04","day":"01","hour":"09","minutes":"00","seconds":"00"},"end_date":"2025-04-01 10:00:00","end_date_details":{"year":"2025","month":"04","day":"01","hour":"10","minutes":"00","seconds":"00"},"utc_start_date":"2025-04-01 09:00:00","utc_start_date_details":{"year":"2025","month":"04","day":"01","hour":"09","minutes":"00","seconds":"00"},"utc_end_date":"2025-04-01 10:00:00","utc_end_date_details":{"year":"2025","month":"04","day":"01","hour":"10","minutes":"00","seconds":"00"},"timezone":"UTC","timezone_abbr":"UTC","cost":"","cost_details":{"currency_symbol":"","currency_code":"","currency_position":"","values":[]},"website":"https:\/\/indico.in2p3.fr\/event\/36029\/","show_map":false,"show_map_link":false,"hide_from_listings":false,"sticky":false,"featured":false,"categories":[],"tags":[],"venue":{"id":8441,"status":"publish","date":"2024-11-25 08:59:56","date_utc":"2024-11-25 07:59:56","modified":"2025-07-21 13:33:57","modified_utc":"2025-07-21 11:33:57","url":"https:\/\/www.lapth.cnrs.fr\/venue\/salle-de-sommets\/","venue":"Salle de Sommets","slug":"salle-de-sommets","json_ld":{"@type":"Place","name":"Salle de Sommets","description":"","url":"","address":{"@type":"PostalAddress"},"telephone":"","sameAs":""},"show_map":true,"show_map_link":true,"global_id":"www.lapth.cnrs.fr\/en\/?id=8441","global_id_lineage":["www.lapth.cnrs.fr\/en\/?id=8441"]},"organizer":[],"custom_fields":[],"json_ld":{"@context":"http:\/\/schema.org","@type":"Event","name":"Implications of $B^+ to K^+  ubar u$ under rank-one flavour violation hypothesis","description":"&lt;p&gt;Speakers: Claudio Toni We study the implications of the observed excess at Belle-II under the assumption of Rank-One Flavour Violation, i.e. that New Physics couples to a single specific direction [&hellip;]&lt;\/p&gt;\\n","url":"https:\/\/www.lapth.cnrs.fr\/en\/event\/implications-of-b-to-k-ubar-u-under-rank-one-flavour-violation-hypothesis\/","eventAttendanceMode":"https:\/\/schema.org\/OfflineEventAttendanceMode","eventStatus":"https:\/\/schema.org\/EventScheduled","startDate":"2025-04-01T09:00:00+00:00","endDate":"2025-04-01T10:00:00+00:00","location":{"@type":"Place","name":"Salle de Sommets","description":"","url":"","address":{"@type":"PostalAddress"},"telephone":"","sameAs":""},"performer":"Organization"},"event_bgcolor":"","event_text_color":""}