{"id":1884,"date":"2026-09-07T18:00:00","date_gmt":"2026-09-07T09:00:00","guid":{"rendered":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-07-lambda-hyperon-edm-limit-vi\/"},"modified":"2026-09-07T18:00:00","modified_gmt":"2026-09-07T09:00:00","slug":"2026-09-07-lambda-hyperon-edm-limit-vi","status":"publish","type":"briefing","link":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-07-lambda-hyperon-edm-limit-vi\/","title":{"rendered":"R\u1ed1i l\u01b0\u1ee3ng t\u1eed si\u1ebft gi\u1edbi h\u1ea1n EDM c\u1ee7a h\u1ea1t Lambda kho\u1ea3ng 1.000 l\u1ea7n"},"content":{"rendered":"

2026-09-07 18:00 KST<\/strong><\/p>\n

Nh\u00f3m h\u1ee3p t\u00e1c BESIII d\u00f9ng c\u1eb7p hyperon Lambda\u2013ph\u1ea3n Lambda r\u1ed1i l\u01b0\u1ee3ng t\u1eed \u0111\u1ec3 t\u0103ng \u0111\u1ed9 nh\u1ea1y v\u1edbi m\u00f4men l\u01b0\u1ee1ng c\u1ef1c \u0111i\u1ec7n kho\u1ea3ng 1.000 l\u1ea7n so v\u1edbi ph\u00e9p \u0111o tr\u1ef1c ti\u1ebfp tr\u01b0\u1edbc. K\u1ebft qu\u1ea3 \u0111\u0103ng tr\u00ean Science ng\u00e0y 3\/9 \u0111\u1ea1t m\u1ee9c 10\u207b\u00b9\u2079 e\u00b7cm.<\/p>\n

Kh\u00f4ng c\u00f3 b\u1eb1ng ch\u1ee9ng cho gi\u00e1 tr\u1ecb kh\u00e1c kh\u00f4ng. C\u00f4ng tr\u00ecnh ch\u01b0a gi\u1ea3i th\u00edch v\u00ec sao v\u1eadt ch\u1ea5t nhi\u1ec1u h\u01a1n ph\u1ea3n v\u1eadt ch\u1ea5t v\u00e0 ch\u01b0a ph\u00e1t hi\u1ec7n v\u1eadt l\u00fd ngo\u00e0i M\u00f4 h\u00ecnh Chu\u1ea9n; n\u00f3 thu h\u1eb9p m\u1ea1nh kho\u1ea3ng m\u00e0 hi\u1ec7u \u1ee9ng \u1ea5y c\u00f3 th\u1ec3 \u1ea9n.<\/p>\n

\u0110\u00e3 \u0111o \u0111i\u1ec1u g\u00ec?<\/h2>\n

M\u00f4men l\u01b0\u1ee1ng c\u1ef1c \u0111i\u1ec7n m\u00f4 t\u1ea3 s\u1ef1 l\u1ec7ch gi\u1eefa ph\u00e2n b\u1ed1 \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng v\u00e0 \u00e2m trong h\u1ea1t. Gi\u00e1 tr\u1ecb th\u01b0\u1eddng tr\u1ef1c kh\u00e1c kh\u00f4ng theo h\u01b0\u1edbng spin s\u1ebd ph\u00e1 \u0111\u1ed1i x\u1ee9ng \u0111\u1ea3o th\u1eddi gian v\u00e0, v\u1edbi gi\u1ea3 \u0111\u1ecbnh CPT th\u00f4ng th\u01b0\u1eddng, h\u00e0m \u00fd ph\u00e1 \u0111\u1ed1i x\u1ee9ng CP. Lambda ch\u1ee9a quark up, down v\u00e0 strange n\u00ean b\u1ed5 sung g\u00f3c nh\u00ecn kh\u00e1c v\u1edbi neutron, nguy\u00ean t\u1eed v\u00e0 ph\u00e2n t\u1eed.<\/p>\n

\u0110o h\u1ea1t s\u1ed1ng r\u1ea5t ng\u1eafn th\u1ebf n\u00e0o?<\/h2>\n

Lambda ph\u00e2n r\u00e3 qu\u00e1 nhanh \u0111\u1ec3 theo d\u00f5i l\u00e2u chuy\u1ec3n \u0111\u1ed9ng ti\u1ebfn \u0111\u1ed9ng spin trong tr\u01b0\u1eddng ngo\u00e0i. T\u1ea1i m\u00e1y va ch\u1ea1m electron\u2013positron B\u1eafc Kinh II, nh\u00f3m ch\u1ecdn kho\u1ea3ng ba tri\u1ec7u ph\u00e2n r\u00e3 J\/\u03c8 th\u00e0nh Lambda\u2013ph\u1ea3n Lambda. Spin c\u1ee7a ch\u00fang r\u1ed1i v\u1edbi nhau v\u00e0 ph\u00e2n b\u1ed1 g\u00f3c c\u1ee7a proton, ph\u1ea3n proton c\u00f9ng pion gi\u1eef th\u00f4ng tin t\u01b0\u01a1ng quan. Ph\u00e9p kh\u1edbp nhi\u1ec1u chi\u1ec1u t\u00ecm b\u1ea5t \u0111\u1ed1i x\u1ee9ng r\u1ea5t nh\u1ecf.<\/p>\n

\"R\u1ed1i
\u0110\u00e2y l\u00e0 h\u00ecnh \u1ea3nh t\u1ea1o b\u1eb1ng AI \u0111\u1ec3 gi\u1ea3i th\u00edch ch\u1ee7 \u0111\u1ec1, kh\u00f4ng ph\u1ea3i \u1ea3nh ch\u1ee5p s\u1ef1 ki\u1ec7n, quan s\u00e1t hay th\u00ed nghi\u1ec7m th\u1ef1c t\u1ebf.<\/figcaption><\/figure>\n

Kho\u1ea3ng 1.000 l\u1ea7n ngh\u0129a l\u00e0 g\u00ec?<\/h2>\n

Kh\u00f4ng ph\u1ea3i l\u01b0\u1ee1ng c\u1ef1c c\u1ee7a h\u1ea1t t\u0103ng 1.000 l\u1ea7n. \u0110\u1ed9 nh\u1ea1y nay ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb nh\u1ecf h\u01a1n kho\u1ea3ng ba b\u1eadc \u0111\u1ed9 l\u1edbn so v\u1edbi ph\u00e9p \u0111o tr\u1ef1c ti\u1ebfp t\u1ea1i Fermilab th\u1eadp ni\u00ean 1980. D\u00f9 \u0111\u1ea1t m\u1ee9c 10\u207b\u00b9\u2079 e\u00b7cm, k\u1ebft qu\u1ea3 v\u1eabn ph\u00f9 h\u1ee3p th\u1ed1ng k\u00ea v\u1edbi s\u1ed1 kh\u00f4ng. \u0110\u00e2y l\u00e0 gi\u1edbi h\u1ea1n ch\u1eb7t h\u01a1n, kh\u00f4ng ph\u1ea3i ph\u00e1t hi\u1ec7n.<\/p>\n

V\u00ec sao r\u1ed1i l\u01b0\u1ee3ng t\u1eed quan tr\u1ecdng?<\/h2>\n

Th\u00f4ng tin spin kh\u00f3 l\u1ea5y t\u1eeb m\u1ed9t h\u1ea1t ph\u00e2n r\u00e3 nhanh c\u00f3 th\u1ec3 suy ra t\u1eeb t\u01b0\u01a1ng quan v\u1edbi ph\u1ea3n h\u1ea1t. Nh\u1edd v\u1eady kh\u00f4ng c\u1ea7n theo d\u00f5i ti\u1ebfn \u0111\u1ed9ng l\u00e2u v\u00e0 r\u1ed1i l\u01b0\u1ee3ng t\u1eed tr\u1edf th\u00e0nh c\u00f4ng c\u1ee5 \u0111o ch\u00ednh x\u00e1c. Chi\u1ebfn l\u01b0\u1ee3c c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng sang hyperon Sigma v\u00e0 Xi.<\/p>\n

C\u00f2n \u0111i\u1ec1u g\u00ec ch\u01b0a bi\u1ebft?<\/h2>\n

K\u1ebft qu\u1ea3 ch\u01b0a ch\u1ecdn \u0111\u01b0\u1ee3c ngu\u1ed3n g\u1ed1c m\u1ea5t c\u00e2n b\u1eb1ng v\u1eadt ch\u1ea5t\u2013ph\u1ea3n v\u1eadt ch\u1ea5t c\u1ee7a v\u0169 tr\u1ee5. C\u1ea7n m\u1eabu l\u1edbn h\u01a1n, ki\u1ec3m so\u00e1t ch\u1eb7t h\u01a1n m\u00f4 h\u00ecnh g\u00f3c v\u00e0 m\u00e1y d\u00f2, c\u00f9ng so s\u00e1nh v\u1edbi EDM \u1edf h\u1ec7 kh\u00e1c. B\u01b0\u1edbc ti\u1ebfp theo l\u00e0 c\u00e1c nghi\u00ean c\u1ee9u tr\u00edch d\u1eabn b\u00e0i Science v\u00e0 ph\u00e2n t\u00edch BESIII v\u1edbi d\u1eef li\u1ec7u l\u1edbn h\u01a1n, nhi\u1ec1u hyperon h\u01a1n.<\/p>\n

Ngu\u1ed3n g\u1ed1c v\u00e0 ki\u1ec3m ch\u1ee9ng \u0111\u1ed9c l\u1eadp<\/h2>\n

Science \uc6d0 \ub17c\ubb38<\/a><\/p>\n

\uc911\uad6d\uacfc\ud559\uc6d0 \uc5f0\uad6c \uc124\uba85<\/a><\/p>\n

\uc911\uad6d\uacfc\ud559\uc6d0\ub300 \uc5f0\uad6c\ud300 \uc124\uba85<\/a><\/p>\n

PubMed \ud559\uc220 \uc0c9\uc778<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

BESIII \u0111\u1ea1t m\u1ee9c 10\u207b\u00b9\u2079 e\u00b7cm cho m\u00f4men l\u01b0\u1ee1ng c\u1ef1c \u0111i\u1ec7n c\u1ee7a hyperon Lambda. Th\u00ed nghi\u1ec7m kh\u00f4ng ph\u00e1t hi\u1ec7n t\u00edn hi\u1ec7u kh\u00e1c kh\u00f4ng hay v\u1eadt l\u00fd m\u1edbi.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-1884","briefing","type-briefing","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing\/1884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing"}],"about":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/types\/briefing"}],"wp:attachment":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/media?parent=1884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}