sfit[10] = (1 - x)^0.26597161873196745*x^0.36866549098465046*
     (0.35894680181019617 + 0.044128797172999286*(1.4343278790834026 + 
        4.117992267503922*(-2 + 2*x) + 2.105653003630723*(-2 + 2*x)^2) + 
      0.024572028140105763*(-0.102693872252683 + 2.6346371097166177*
         (-1 + 2*x)))
 
sfit[12] = (1 - x)^0.23993523226922164*x^0.19196474855639212*
     (0.30998548601592096 + 0.03148174040097481*(1.388687306245875 + 
        3.843616840337679*(-2 + 2*x) + 1.9012296824020578*(-2 + 2*x)^2) + 
      0.049670006627664236*(0.047970483712829526 + 2.4318999808256136*
         (-1 + 2*x)))
 
sfit[15] = (1 - x)^0.2513419813630658*x^0.32087145800987826*
     (0.36028778613521606 + 0.027857327551689355*(1.4085993678423545 + 
        4.021137041224828*(-2 + 2*x) + 2.041615286976203*(-2 + 2*x)^2) + 
      0.05275773605127468*(-0.06952947664681247 + 2.5722134393729443*
         (-1 + 2*x)))
 
sfit[20] = (1 - x)^0.25903853188954545*x^0.37307406524065867*
     (0.39991323660088174 + 0.013632954974763507*(1.4221082783360637 + 
        4.102541154539271*(-2 + 2*x) + 2.103044314420265*(-2 + 2*x)^2) + 
      0.07109963126849533*(-0.11403553335111322 + 2.632112597130204*
         (-1 + 2*x)))
 
sfit[30] = (1 - x)^0.3048227982270658*x^0.38125133968326436*
     (0.4621450617666021 + 0.006669888782667256*(1.5036926665000883 + 
        4.247873854505453*(-2 + 2*x) + 2.1591520860102142*(-2 + 2*x)^2) + 
      0.11648755048062026*(-0.07642854145619854 + 2.6860741379103303*
         (-1 + 2*x)))
 
sfit[40] = (1 - x)^0.3443242217390505*x^0.39555672918544565*
     (0.5175012545963422 + 0.00897243758386524*(1.5757659174466772 + 
        4.383746749836385*(-2 + 2*x) + 2.215823809751551*(-2 + 2*x)^2) + 
      0.1538080258275252*(-0.05123250744639518 + 2.7398809509244964*
         (-1 + 2*x)))
 
sfit[50] = (1 - x)^0.374821538403637*x^0.4104939638715799*
     (0.5642944689776406 + 0.01661591095927965*(1.6324779004310903 + 
        4.494724392228183*(-2 + 2*x) + 2.2642411192550367*(-2 + 2*x)^2) + 
      0.18396048196563072*(-0.03567242546794286 + 2.7853155022752167*
         (-1 + 2*x)))
 
sfitAll[10] = ((1 - x)^0.1463870726531503*(0.027831138724562506 + 
       0.0620486551362835*(1.2302951964997049 + 2.396727860641201*
          (-2 + 2*x) + 0.9025936580275534*(-2 + 2*x)^2) + 
       0.10765947665963733*(1.05950700427884 + 1.2332671410274607*
          (-1 + 2*x))))/x^0.9131199316256897
 
sfitAll[12] = ((1 - x)^0.19288213036339433*(0.08692202177505408 + 
       0.057057306353393435*(1.3079249536518522 + 2.7789982294501008*
          (-2 + 2*x) + 1.1198210727653666*(-2 + 2*x)^2) + 
       0.1073508983304509*(0.851201922905578 + 1.5345623378212108*
          (-1 + 2*x))))/x^0.6583197925421836
 
sfitAll[15] = ((1 - x)^0.21025189582725043*(0.08960780033695093 + 
       0.06855054066576219*(1.3374807735903522 + 2.8289334951453298*
          (-2 + 2*x) + 1.1390692198199757*(-2 + 2*x)^2) + 
       0.1201584778251714*(0.8606747509138576 + 1.5598290407406434*
          (-1 + 2*x))))/x^0.6504228550866071
 
sfitAll[20] = ((1 - x)^0.2513911097493645*(0.11821698273240346 + 
       0.08450630303532292*(1.4086854096545556 + 3.0265344150520836*
          (-2 + 2*x) + 1.2396387006410787*(-2 + 2*x)^2) + 
       0.13876251222782002*(0.8141916836775127 + 1.6885905358212163*
          (-1 + 2*x))))/x^0.5628005739281482
 
sfitAll[30] = ((1 - x)^0.32763183857654105*(0.1959073607508685 + 
       0.1118508234817568*(1.545119068689334 + 3.4375880963760994*
          (-2 + 2*x) + 1.4597740201467502*(-2 + 2*x)^2) + 
       0.1729170772917914*(0.7015421827106014 + 1.9537214944424806*
          (-1 + 2*x))))/x^0.3739103441340603
 
sfitAll[40] = ((1 - x)^0.3626613150301711*(0.23172193259314824 + 
       0.13641431110150476*(1.609753587254963 + 3.591339036995739*
          (-2 + 2*x) + 1.535270300126269*(-2 + 2*x)^2) + 
       0.20098466775938767*(0.685243195780632 + 2.04007943427971*
          (-1 + 2*x))))/x^0.32258188075046085
 
sfitAll[50] = ((1 - x)^0.391160516444282*(0.2687657689849864 + 
       0.1571359361783303*(1.6632440494789018 + 3.733349136699843*
          (-2 + 2*x) + 1.6091767384775197*(-2 + 2*x)^2) + 
       0.22384669937981655*(0.6596957544723495 + 2.1226252784162147*
          (-1 + 2*x))))/x^0.2685352380280675
 
fitMassSquared = -0.9534409760154304 - 0.5528773337710792/k^2 + 
     1.8704370615470611/k - 0.008819841471860067*k + 
     0.38426683326540906*Log[k]
