id sid tid token lemma pos x920ft86t31 1 1 the the DET x920ft86t31 1 2 fine fine ADJ x920ft86t31 1 3 - - PUNCT x920ft86t31 1 4 structure structure NOUN x920ft86t31 1 5 constant constant ADJ x920ft86t31 1 6 or or CCONJ x920ft86t31 1 7 electromagnetic electromagnetic ADJ x920ft86t31 1 8 coupling coupling NOUN x920ft86t31 1 9 constant constant ADJ x920ft86t31 1 10 , , PUNCT x920ft86t31 1 11 & & CCONJ x920ft86t31 1 12 # # SYM x920ft86t31 1 13 945;e 945;e NUM x920ft86t31 1 14 , , PUNCT x920ft86t31 1 15 is be AUX x920ft86t31 1 16 a a DET x920ft86t31 1 17 dimensionless dimensionless NOUN x920ft86t31 1 18 ratio ratio NOUN x920ft86t31 1 19 which which PRON x920ft86t31 1 20 unites unite VERB x920ft86t31 1 21 many many ADJ x920ft86t31 1 22 physics physics NOUN x920ft86t31 1 23 subfields subfield NOUN x920ft86t31 1 24 . . PUNCT x920ft86t31 2 1 although although SCONJ x920ft86t31 2 2 known know VERB x920ft86t31 2 3 precisely precisely ADV x920ft86t31 2 4 via via ADP x920ft86t31 2 5 experiments experiment NOUN x920ft86t31 2 6 in in ADP x920ft86t31 2 7 each each DET x920ft86t31 2 8 subfield subfield NOUN x920ft86t31 2 9 , , PUNCT x920ft86t31 2 10 there there PRON x920ft86t31 2 11 is be VERB x920ft86t31 2 12 disagreement disagreement NOUN x920ft86t31 2 13 within within ADP x920ft86t31 2 14 and and CCONJ x920ft86t31 2 15 between between ADP x920ft86t31 2 16 subfields subfield NOUN x920ft86t31 2 17 . . PUNCT x920ft86t31 3 1 in in ADP x920ft86t31 3 2 particular particular ADJ x920ft86t31 3 3 , , PUNCT x920ft86t31 3 4 precise precise ADJ x920ft86t31 3 5 values value NOUN x920ft86t31 3 6 obtained obtain VERB x920ft86t31 3 7 via via ADP x920ft86t31 3 8 electron electron NOUN x920ft86t31 3 9 ge ge PROPN x920ft86t31 3 10 2 2 NUM x920ft86t31 3 11 experiments experiment NOUN x920ft86t31 3 12 which which PRON x920ft86t31 3 13 depend depend VERB x920ft86t31 3 14 heavily heavily ADV x920ft86t31 3 15 on on ADP x920ft86t31 3 16 qed qed PROPN x920ft86t31 3 17 calculations calculation NOUN x920ft86t31 3 18 have have AUX x920ft86t31 3 19 not not PART x920ft86t31 3 20 always always ADV x920ft86t31 3 21 been be AUX x920ft86t31 3 22 in in ADP x920ft86t31 3 23 agreement agreement NOUN x920ft86t31 3 24 with with ADP x920ft86t31 3 25 those those PRON x920ft86t31 3 26 obtained obtain VERB x920ft86t31 3 27 via via ADP x920ft86t31 3 28 muon muon NOUN x920ft86t31 3 29 gμ gμ PROPN x920ft86t31 3 30 ; ; PUNCT x920ft86t31 3 31 2 2 NUM x920ft86t31 3 32 experiments experiment NOUN x920ft86t31 3 33 . . PUNCT x920ft86t31 4 1 also also ADV x920ft86t31 4 2 , , PUNCT x920ft86t31 4 3 solid solid ADJ x920ft86t31 4 4 state state NOUN x920ft86t31 4 5 measurements measurement NOUN x920ft86t31 4 6 ( ( PUNCT x920ft86t31 4 7 quantum quantum PROPN x920ft86t31 4 8 hall hall NOUN x920ft86t31 4 9 effect effect NOUN x920ft86t31 4 10 and and CCONJ x920ft86t31 4 11 ac ac PROPN x920ft86t31 4 12 josephson josephson PROPN x920ft86t31 4 13 effect effect PROPN x920ft86t31 4 14 ) ) PUNCT x920ft86t31 4 15 often often ADV x920ft86t31 4 16 disagree disagree VERB x920ft86t31 4 17 with with ADP x920ft86t31 4 18 neutronic neutronic PROPN x920ft86t31 4 19 h h PROPN x920ft86t31 4 20 / / SYM x920ft86t31 4 21 mn mn PROPN x920ft86t31 4 22 measurements measurement NOUN x920ft86t31 4 23 . . PUNCT x920ft86t31 5 1 & & CCONJ x920ft86t31 5 2 # # SYM x920ft86t31 5 3 945;e 945;e NUM x920ft86t31 5 4 is be AUX x920ft86t31 5 5 often often ADV x920ft86t31 5 6 said say VERB x920ft86t31 5 7 to to PART x920ft86t31 5 8 vary vary VERB x920ft86t31 5 9 with with ADP x920ft86t31 5 10 energy energy NOUN x920ft86t31 6 1 but but CCONJ x920ft86t31 6 2 the the DET x920ft86t31 6 3 question question NOUN x920ft86t31 6 4 remains remain VERB x920ft86t31 6 5 as as ADP x920ft86t31 6 6 to to ADP x920ft86t31 6 7 whether whether SCONJ x920ft86t31 6 8 or or CCONJ x920ft86t31 6 9 not not PART x920ft86t31 6 10 its its PRON x920ft86t31 6 11 low low ADJ x920ft86t31 6 12 energy energy NOUN x920ft86t31 6 13 value value NOUN x920ft86t31 6 14 is be AUX x920ft86t31 6 15 stable stable ADJ x920ft86t31 6 16 now now ADV x920ft86t31 6 17 or or CCONJ x920ft86t31 6 18 has have AUX x920ft86t31 6 19 been be AUX x920ft86t31 6 20 stable stable ADJ x920ft86t31 6 21 over over ADP x920ft86t31 6 22 the the DET x920ft86t31 6 23 history history NOUN x920ft86t31 6 24 of of ADP x920ft86t31 6 25 the the DET x920ft86t31 6 26 universe universe NOUN x920ft86t31 6 27 . . PUNCT x920ft86t31 7 1 improved improved ADJ x920ft86t31 7 2 precision precision NOUN x920ft86t31 7 3 helps help VERB x920ft86t31 7 4 resolve resolve VERB x920ft86t31 7 5 these these DET x920ft86t31 7 6 issues issue NOUN x920ft86t31 7 7 as as SCONJ x920ft86t31 7 8 they they PRON x920ft86t31 7 9 relate relate VERB x920ft86t31 7 10 to to ADP x920ft86t31 7 11 physics physics NOUN x920ft86t31 7 12 , , PUNCT x920ft86t31 7 13 possibly possibly ADV x920ft86t31 7 14 beyond beyond ADP x920ft86t31 7 15 the the DET x920ft86t31 7 16 standard standard ADJ x920ft86t31 7 17 model model NOUN x920ft86t31 7 18 . . PUNCT x920ft86t31 8 1 the the DET x920ft86t31 8 2 optical optical ADJ x920ft86t31 8 3 frequency frequency NOUN x920ft86t31 8 4 measurements measurement NOUN x920ft86t31 8 5 group group NOUN x920ft86t31 8 6 in in ADP x920ft86t31 8 7 the the DET x920ft86t31 8 8 time time NOUN x920ft86t31 8 9 and and CCONJ x920ft86t31 8 10 frequency frequency NOUN x920ft86t31 8 11 division division NOUN x920ft86t31 8 12 at at ADP x920ft86t31 8 13 the the DET x920ft86t31 8 14 national national PROPN x920ft86t31 8 15 institute institute PROPN x920ft86t31 8 16 of of ADP x920ft86t31 8 17 science science NOUN x920ft86t31 8 18 and and CCONJ x920ft86t31 8 19 technology technology NOUN x920ft86t31 8 20 ( ( PUNCT x920ft86t31 8 21 nist nist NOUN x920ft86t31 8 22 , , PUNCT x920ft86t31 8 23 boulder boulder NOUN x920ft86t31 8 24 , , PUNCT x920ft86t31 8 25 co co NOUN x920ft86t31 8 26 ) ) PUNCT x920ft86t31 8 27 developed develop VERB x920ft86t31 8 28 and and CCONJ x920ft86t31 8 29 maintains maintain VERB x920ft86t31 8 30 a a DET x920ft86t31 8 31 femtosecond femtosecond ADJ x920ft86t31 8 32 laser laser NOUN x920ft86t31 8 33 frequency frequency NOUN x920ft86t31 8 34 comb comb NOUN x920ft86t31 8 35 which which PRON x920ft86t31 8 36 is be AUX x920ft86t31 8 37 calibrated calibrate VERB x920ft86t31 8 38 with with ADP x920ft86t31 8 39 respect respect NOUN x920ft86t31 8 40 to to ADP x920ft86t31 8 41 the the DET x920ft86t31 8 42 cesium cesium NOUN x920ft86t31 8 43 fountain fountain NOUN x920ft86t31 8 44 clock clock NOUN x920ft86t31 8 45 implementation implementation NOUN x920ft86t31 8 46 of of ADP x920ft86t31 8 47 the the DET x920ft86t31 8 48 second second ADJ x920ft86t31 8 49 . . PUNCT x920ft86t31 9 1 a a DET x920ft86t31 9 2 single single ADJ x920ft86t31 9 3 frequency frequency NOUN x920ft86t31 9 4 component component NOUN x920ft86t31 9 5 of of ADP x920ft86t31 9 6 the the DET x920ft86t31 9 7 femtosecond femtosecond ADJ x920ft86t31 9 8 laser laser NOUN x920ft86t31 9 9 comb comb NOUN x920ft86t31 9 10 is be AUX x920ft86t31 9 11 used use VERB x920ft86t31 9 12 together together ADV x920ft86t31 9 13 with with ADP x920ft86t31 9 14 a a DET x920ft86t31 9 15 solid solid ADJ x920ft86t31 9 16 state state NOUN x920ft86t31 9 17 diode diode NOUN x920ft86t31 9 18 laser laser NOUN x920ft86t31 9 19 and and CCONJ x920ft86t31 9 20 cesium cesium NOUN x920ft86t31 9 21 thermal thermal ADJ x920ft86t31 9 22 beam beam NOUN x920ft86t31 9 23 to to PART x920ft86t31 9 24 precisely precisely ADV x920ft86t31 9 25 measure measure VERB x920ft86t31 9 26 the the DET x920ft86t31 9 27 cesium cesium NOUN x920ft86t31 9 28 d1 d1 X x920ft86t31 9 29 f∈{3,4 f∈{3,4 ADJ x920ft86t31 9 30 } } PUNCT x920ft86t31 9 31 transition transition NOUN x920ft86t31 9 32 frequencies frequency NOUN x920ft86t31 9 33 . . PUNCT x920ft86t31 10 1 the the DET x920ft86t31 10 2 value value NOUN x920ft86t31 10 3 of of ADP x920ft86t31 10 4 fd1centroid=335 fd1centroid=335 NOUN x920ft86t31 10 5 116 116 NUM x920ft86t31 10 6 048 048 NUM x920ft86t31 10 7 748.1(2.4 748.1(2.4 NUM x920ft86t31 10 8 ) ) PUNCT x920ft86t31 10 9 khz khz NOUN x920ft86t31 10 10 obtained obtain VERB x920ft86t31 10 11 for for ADP x920ft86t31 10 12 the the DET x920ft86t31 10 13 transition transition NOUN x920ft86t31 10 14 centroid centroid NOUN x920ft86t31 10 15 is be AUX x920ft86t31 10 16 over over ADP x920ft86t31 10 17 fifteen fifteen NUM x920ft86t31 10 18 times time NOUN x920ft86t31 10 19 more more ADV x920ft86t31 10 20 precise precise ADJ x920ft86t31 10 21 than than ADP x920ft86t31 10 22 the the DET x920ft86t31 10 23 most most ADV x920ft86t31 10 24 recent recent ADJ x920ft86t31 10 25 previous previous ADJ x920ft86t31 10 26 measurement measurement NOUN x920ft86t31 10 27 . . PUNCT x920ft86t31 11 1 a a DET x920ft86t31 11 2 precise precise ADJ x920ft86t31 11 3 value value NOUN x920ft86t31 11 4 for for ADP x920ft86t31 11 5 the the DET x920ft86t31 11 6 cesium cesium NOUN x920ft86t31 11 7 d1 d1 PROPN x920ft86t31 11 8 hyperfine hyperfine ADJ x920ft86t31 11 9 splitting splitting NOUN x920ft86t31 11 10 fhfe=1 fhfe=1 PROPN x920ft86t31 11 11 167 167 NUM x920ft86t31 11 12 723.6(4.7 723.6(4.7 NUM x920ft86t31 11 13 ) ) PUNCT x920ft86t31 11 14 khz khz NOUN x920ft86t31 11 15 is be AUX x920ft86t31 11 16 reported report VERB x920ft86t31 11 17 as as ADV x920ft86t31 11 18 well well ADV x920ft86t31 11 19 . . PUNCT x920ft86t31 12 1 this this DET x920ft86t31 12 2 value value NOUN x920ft86t31 12 3 is be AUX x920ft86t31 12 4 also also ADV x920ft86t31 12 5 over over ADP x920ft86t31 12 6 fifteen fifteen NUM x920ft86t31 12 7 times time NOUN x920ft86t31 12 8 more more ADV x920ft86t31 12 9 precise precise ADJ x920ft86t31 12 10 than than ADP x920ft86t31 12 11 the the DET x920ft86t31 12 12 most most ADV x920ft86t31 12 13 recent recent ADJ x920ft86t31 12 14 previous previous ADJ x920ft86t31 12 15 measurement measurement NOUN x920ft86t31 12 16 . . PUNCT x920ft86t31 13 1 these these DET x920ft86t31 13 2 new new ADJ x920ft86t31 13 3 neutral neutral ADJ x920ft86t31 13 4 133cs 133cs NOUN x920ft86t31 13 5 6s2så_→6p2på 6s2så_→6p2på NUM x920ft86t31 13 6 _ _ NOUN x920ft86t31 13 7 transition transition NOUN x920ft86t31 13 8 ( ( PUNCT x920ft86t31 13 9 d1 d1 NOUN x920ft86t31 13 10 ) ) PUNCT x920ft86t31 13 11 frequencies frequency NOUN x920ft86t31 13 12 , , PUNCT x920ft86t31 13 13 when when SCONJ x920ft86t31 13 14 combined combine VERB x920ft86t31 13 15 with with ADP x920ft86t31 13 16 the the DET x920ft86t31 13 17 2002 2002 NUM x920ft86t31 13 18 codata codata NOUN x920ft86t31 13 19 values value NOUN x920ft86t31 13 20 of of ADP x920ft86t31 13 21 the the DET x920ft86t31 13 22 rydberg rydberg PROPN x920ft86t31 13 23 , , PUNCT x920ft86t31 13 24 proton proton NOUN x920ft86t31 13 25 / / SYM x920ft86t31 13 26 electron electron NOUN x920ft86t31 13 27 mass mass NOUN x920ft86t31 13 28 ratio ratio NOUN x920ft86t31 13 29 , , PUNCT x920ft86t31 13 30 cesium cesium PROPN x920ft86t31 13 31 atomic atomic PROPN x920ft86t31 13 32 mass mass PROPN x920ft86t31 13 33 , , PUNCT x920ft86t31 13 34 and and CCONJ x920ft86t31 13 35 cesium cesium NOUN x920ft86t31 13 36 recoil recoil NOUN x920ft86t31 13 37 frequency frequency NOUN x920ft86t31 13 38 , , PUNCT x920ft86t31 13 39 provide provide VERB x920ft86t31 13 40 an an DET x920ft86t31 13 41 almost almost ADV x920ft86t31 13 42 qed qed PROPN x920ft86t31 13 43 - - PUNCT x920ft86t31 13 44 free free ADJ x920ft86t31 13 45 value value NOUN x920ft86t31 13 46 of of ADP x920ft86t31 13 47 alpha alpha NOUN x920ft86t31 13 48 : : PUNCT x920ft86t31 13 49 & & CCONJ x920ft86t31 13 50 # # SYM x920ft86t31 13 51 945;e=1/137.036 945;e=1/137.036 NUM x920ft86t31 13 52 0000(11 0000(11 NUM x920ft86t31 13 53 ) ) PUNCT x920ft86t31 13 54 or or CCONJ x920ft86t31 13 55 7.7 7.7 NUM x920ft86t31 13 56 ppb ppb NOUN x920ft86t31 13 57 . . PUNCT x920ft86t31 14 1 this this DET x920ft86t31 14 2 value value NOUN x920ft86t31 14 3 for for ADP x920ft86t31 14 4 & & CCONJ x920ft86t31 14 5 # # SYM x920ft86t31 14 6 945;e 945;e NUM x920ft86t31 14 7 is be AUX x920ft86t31 14 8 comparable comparable ADJ x920ft86t31 14 9 in in ADP x920ft86t31 14 10 precision precision NOUN x920ft86t31 14 11 with with ADP x920ft86t31 14 12 these these DET x920ft86t31 14 13 other other ADJ x920ft86t31 14 14 measurements measurement NOUN x920ft86t31 14 15 . . PUNCT x920ft86t31 15 1 when when SCONJ x920ft86t31 15 2 this this DET x920ft86t31 15 3 value value NOUN x920ft86t31 15 4 is be AUX x920ft86t31 15 5 combined combine VERB x920ft86t31 15 6 with with ADP x920ft86t31 15 7 the the DET x920ft86t31 15 8 other other ADJ x920ft86t31 15 9 measurements measurement NOUN x920ft86t31 15 10 used use VERB x920ft86t31 15 11 to to PART x920ft86t31 15 12 calculate calculate VERB x920ft86t31 15 13 the the DET x920ft86t31 15 14 2002 2002 NUM x920ft86t31 15 15 codata codata NOUN x920ft86t31 15 16 recommended recommend VERB x920ft86t31 15 17 value value NOUN x920ft86t31 15 18 , , PUNCT x920ft86t31 15 19 an an DET x920ft86t31 15 20 improved improved ADJ x920ft86t31 15 21 value value NOUN x920ft86t31 15 22 of of ADP x920ft86t31 15 23 & & CCONJ x920ft86t31 15 24 # # SYM x920ft86t31 15 25 945;e=1/137.035 945;e=1/137.035 NUM x920ft86t31 15 26 999 999 NUM x920ft86t31 15 27 08(46 08(46 NOUN x920ft86t31 15 28 ) ) PUNCT x920ft86t31 15 29 is be AUX x920ft86t31 15 30 obtained obtain VERB x920ft86t31 15 31 . . PUNCT