# What's the Standard Model width of a 125 GeV Higgs?

There's a fairly broad mass spread in the new results out of Atlas and CMS. I'm curious how this fits with the expected SM width.

• Tiny, << 1 GeV. The only significant modes are b-bbar and tau-taubar and both are relatively light. Found the answer and references here: math.columbia.edu/~woit/wordpress/… The observed width and uncertainty is all from the detectors. Dec 13, 2011 at 17:15 The 125 Higgs decays to (virtual or real) $b\bar b$ (messy final state, a bit hard to isolate from the background) in 65% of cases, $WW$ (neutrinos from the decayed $W$ are missing energy) in 20%, $gg$ (messy) in 7% of cases, $\tau\tau$ in 6% of cases, $ZZ$ in 3% of cases, $c\bar c$ in 2% of cases, $\gamma\gamma$ in 0.2%, $\gamma Z$ in 0.15% of cases. The numbers were estimated by looking at the graph above so they don't quite add to 100 percent, sorry.
{"ft_lang_label":"__label__en","ft_lang_prob":0.90651125,"math_prob":0.95757276,"size":1361,"snap":"2022-27-2022-33","text_gpt3_token_len":377,"char_repetition_ratio":0.115696386,"word_repetition_ratio":0.0,"special_character_ratio":0.27185893,"punctuation_ratio":0.12014134,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9926124,"pos_list":[0,1,2,3,4],"im_url_duplicate_count":[null,2,null,2,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2022-06-28T07:20:47Z\",\"WARC-Record-ID\":\"<urn:uuid:5ff53e6f-71f6-41d0-9804-0f66697315b5>\",\"Content-Length\":\"225282\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:98d9095c-8a5b-45d2-bb84-799c6544fb00>\",\"WARC-Concurrent-To\":\"<urn:uuid:585e2857-c67c-41cf-b82a-b793ebbf50fb>\",\"WARC-IP-Address\":\"151.101.65.69\",\"WARC-Target-URI\":\"https://physics.stackexchange.com/questions/18242/whats-the-standard-model-width-of-a-125-gev-higgs\",\"WARC-Payload-Digest\":\"sha1:42BWLJ5XSZEOCLLR7O7EW2IVCFUNRHLY\",\"WARC-Block-Digest\":\"sha1:Q3OHLYPCVMTIJNQOBCMPIFVFWXPY6T74\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2022/CC-MAIN-2022-27/CC-MAIN-2022-27_segments_1656103355949.26_warc_CC-MAIN-20220628050721-20220628080721-00179.warc.gz\"}"}